“Psychometric properties and factor structure of the attitudes to fertility and childbearing scale (AFCS) in a sample of polish women”

The study aimed to determine the psychometric properties and factor structure of the Attitudes to Fertility and Childbearing Scale (AFCS) in a Polish context. A cross-sectional self-assessment study was conducted with a total group of 748 Polish women in two studies (n = 187 and n = 561, respectively). Exploratory factor analysis (EFA) and confirmatory factor analysis (CFA), using SEM were performed. A three-factor structure was extracted by the EFA; although it differed to that identified in the original studies, the CFA found it to be robust. The final Polish version of the AFCS consists of 26 statements, comprising three factors (Fertility and the child as an important value, Child as a barrier, and Personal awareness and responsibility concerning having a child), which have demonstrated satisfactory internal consistency. Although the original AFCS factor structure was not replicated, our findings demonstrate that the Polish adaptation of the Attitudes to Fertility and Childbearing Scale is a reliable and valid instrument for evaluating attitudes concerning fertility and childbearing in the Polish context.


Introduction
Research on fertility and reproductive decisions indicates that the age of first pregnancy and the birth of the first child is steadily increasing in highly-developed countries (Australian Bureau of Statistics 2012; Graham et al. 2015;Sleebos 2003;Thévenon 2010;Vujčić et al. 2017). This trend is also visible in Poland, where demographers have been warning about a decline in birthrate since the early nineties (Centrum Badania Opinii Społecznych -Public Opinion Research Centre, CBOS); this fall is seen as the main cause of the decreasing population of the country (CBOS 2010). Forecasts by the Polish Central Statistical Office (2008) for the years 2008-2035 suggest that the population in Poland will decline at an increasing pace. The fertility rate in Poland is currently only 1.3, which is one of the lowest in both the European Union and the world (Central Statistical Office 2017).
In Poland, the mean age of a mother at the birth of her first child rose from 27.4 years in 2014 to 27.8 in 2016(Central Statistical Office 2017. Three studies on the reproductive decisions of Polish citizens carried out in the last seven years have shown that, despite the social and economic changes that occurred in Poland during this period, neither the percentage of women planning to have their first or subsequent child nor the determinants of reproduction, changed significantly over this time (CBOS 2010(CBOS , 2013(CBOS , 2017. Reproductive plans and decisions are influenced by the age of the respondents, the presence of an existing child, and the civil status of the partner (CBOS 2010(CBOS , 2013. The most common reasons given for postponing or resigning from parenthood include difficulties in reconciling family and professional roles, lack of an appropriate partner, fear of losing a job, and valuing a career higher than parenthood. Highly-educated women are less likely to declare a willingness to have children (CBOS 2010).
It has been found that the most important barriers to reproductive plans mentioned by women who do not intend to have offspring are the financial situation and the expected conflict between their professional and parental roles (CBOS 2013). In contrast, the possibility of getting help with day-to-day care from parents or a partner are both conducive to the decision of having a child.
Since 2015, the economic situation in Poland has improved, and a pro-family policy has been introduced supporting decisions about having first and subsequent children. Despite these changes, the percentage of women in the reproductive age group in the population who plan to have children has remained virtually unchanged (CBOS 2017). Among the sociodemographic factors affecting the decision whether to have children, the age of the mother and the number of children merit particular attention, as women without children were more likely to declare plans to have offspring than those who were already mothers. Besides, the groups of women who were most likely to declare short-term plans for starting a family were those aged 25-29 years, those living in larger cities (i.e. over 500,000 residents), those who had completed higher education, those with a positive assessment of their economic situation, those in a relationship (married or informal), and those who could count on family support in child care (CBOS 2013).
The reasons for postponing or resigning from motherhood are consistent with the data presented in world surveys. Most women express a desire to complete their education (Thalberg 2013), gain independence, and stabilize their situation on the labour market (Söderberg et al. 2015) before deciding to have a child.
The lack of a stable relationship, as well as the lack of a partner who would be a suitable candidate for a father, also plays a role in delaying decisions about the birth of a child (Söderberg et al. 2015). Other reasons include the economic situation and the lack of governmental support programs for families (Mills et al. 2011). The perceived social and moral changes that have occurred regarding motherhood also seem to be important. As Kluzowa and Slany (2004) note, this is the first time in history that women have had reproductive freedom allowing them to decide whether to include children in their lives. The development of assisted reproduction techniques has also allowed motherhood to be postponed to a later date (Kubiak-Fortecka and Wilczyński 2009). Nevertheless, late motherhood carries numerous complications associated with pregnancy and birth, such as diseases associated with pregnancy, fetal malformations, genetic diseases, and miscarriage, as well as premature births and more frequent indications for a cesarean section (Joseph et al. 2005;Astolfi and Zonta 2002;Kubiak-Fortecka and Wilczyński 2009). Hence, it is understandable that women may be reluctant to become mothers at a later age.
Other variables than just sociodemographic factors also appear to have a significant influence on reproductive decisions. Söderberg et al. (2015) recommend that predictors of postponing motherhood should be sought among the beliefs and attitudes towards fertility and motherhood. Such attitudes can be measured with the Attitudes to Fertility and Childbearing Scale (AFCS) (Söderberg et al. 2013).
The AFCS was developed for the assessment of attitudes towards fertility and childbearing (Söderberg et al. 2013). The authors report that the statements included in the AFCS were derived from two previous qualitative studies, both of which focused on the lived experience of fertility and thoughts on having children (Söderberg et al. 2011;Söderberg et al. 2012). Each statement of the AFCS is evaluated on a 5-point Likert scale, with 1 indicating "I completely disagree" and 5 "I completely agree". The psychometric properties of the original version were evaluated among 138 Swedish women who were not yet mothers. The factor structure, investigated by principal component analysis (PCA), identified three components: the importance of fertility for the future (nine statements), childbearing as a hindrance at present (twelve statements), and social identity (six statements). The AFCS showed acceptable sample adequacy, factorability, and internal consistency, with the components demonstrating Cronbach's α reliability coefficients of .901 for the Importance of fertility for the future; .908 for Childbearing as a hindrance at present and .805 for Social identity. The characteristics of the original AFCS and the construction process are described in more detail in Söderberg et al. (2013).
A further validation study conducted on 424 childless women in Sweden revealed a similar three-factor structure; however, the statements included in the particular factors differed slightly. The new components, which had high reliability, were renamed as follows: Importance for the future (Cronbach's α = .945); Hindrance at present (Cronbach's α = .916); and Female identity (Cronbach's α = .862) (Söderberg et al. 2013;Söderberg et al. 2015). In a Japanese adaptation study involving women and men, exploratory factor analysis (EFA) identified five factors, for which the reliability coefficients ranged from 0.77 to 0.91 (Miyata et al. 2017).
Considering the fact that a deeper understanding of the attitudes towards fertility and motherhood may help clarify the decision to have children among Polish women, there is a great need for further study in this area. Therefore, the Attitudes to Fertility and Childbearing Scale (AFCS) (Söderberg et al. 2013;Söderberg et al. 2015) has been adapted for use in the Polish context. The study aimed to validate the factor structure of the Polish version of the AFCS and to determine its psychometric properties among Polish women.

Recruitment Procedure
Recruitment for participation in the study took place during two periods: from January to March 2016 (Study 1) and from June 2016 to January 2017 (Study 2). Three recruitment methods were used: a) an advertisement posted on social media, mainly on groups devoted to women's issues, b) information about the study sent by e-mail to students of Psychology and Logopedics studying at the Lodz University, c) snowball sampling among the friends and relatives of the author and the participants. Women who responded and declared an interest in participating in the study received a paper or electronic version of the survey to complete. Both versions were identical and consisted of the demographic questions and AFCS statements. Access to the electronic version of the survey was personalized. Participants could choose whether to complete the questionnaire in an electronic or paper format.
Following the Helsinki Declaration of Human Rights (World Medical Association 2013), both the paper and electronic surveys contained all the information about the study that enabled participants to give their informed consent. In the paper version of the survey participants signed the informed consent form while in the electronic version the consent was given in accordance with the Ethics Guidelines for Internetmediated Research (British Psychological Society 2017). As there were no socio-demographic differences between the groups recruited traditionally and via the Internet, the two groups were merged for further analyses.
The following inclusion criteria were applied: female sex, being heterosexual, 18 years of age at the time of admission to the study, and giving informed consent for participation in the study. Participation was voluntary, and each participant could withdraw participation at any time. The study protocol was approved by the Committee for Bioethics of Scientific

Study 1
The first study included women aged 24 to 33 (M = 27.38, SD = 2.81). Of the 212 who volunteered to participate, 187 (response rate: 88.2%) completed a set of questionnaires. Most of these 187 respondents lived in informal relationships (47%) or were single (29%), had a university degree (53%), and assessed their financial situation as satisfactory (79%). More detailed sociodemographic characteristics of the Study 1 group are presented in Table 1. The results obtained in this study were used only to check the discriminatory power of the tool and the factor structure of the Polish language version of the AFCS.

Study 2
Of the 772 women who responded to recruitment for this study, 561 fulfilled the eligibility criteria and returned completed questionnaires (response rate: 73%). The analysis revealed that the participants ranged in age from 18 to 46 years old (M = 25.75, SD = 5.35). Most respondents were aged under 25 years of age (58.1%). Less than half had a university degree (43.9%), were not in active employment (43.6%) or were in informal relationships (45.3%); a majority came from a middle-sized city (71.8%), did not have children (85.9%) and rated their financial situation as satisfactory (80.6%). More detailed sociodemographic characteristics are presented in Table 1.

Social-Demographic Data Questionnaire
The socio-demographic data collection tool was developed for the current study. Most questions were based on those used in Swedish samples (Söderberg et al. 2013;Söderberg et al. 2015); these included age (with four age ranges: <25 / 26-30 / 31-35 / >36), civil status (married/having a partner / single), having a child (yes / no), education level (high school and lower / college or university), occupation status (working / studying and working / not studying and not working / studying and not working), place of residence (large city / middlesized city / countryside) and financial status (excellent / satisfactory / bad). The participants were asked about the use of contraception (yes / no), growing up with siblings (yes / no), and whether they have grown up with both parents (yes/no). They were also asked to indicate their preferred age to have a first child (20-24 / 25-29 / 30-34 / 35-39). For women declaring childlessness by choice, the answers included the option: not applicabledon't want to have children.

The Attitudes to Fertility and Childbearing Scale (AFCS) -Polish Language Version
The translation of the Attitudes to Fertility and Childbearing Scale (AFCS) was performed using the Swedish-language version of the AFCS, consisting of 49 statements, received from the first author. Since this version did not contain the name of the tool in Swedish, the English title given in earlier publications was used (Söderberg et al. 2013;Söderberg et al. 2015). In the first stage, a bilingual translator translated the original statements from Swedish into Polish (forward translation). The same was done for the translation of the name of each scale. Next, a team of competent judges was formed, consisting of six women aged 24-39 (two of whom had children, two declared childlessness by choice and two who were currently trying to conceive), and a psychologist (a researcher in the field of reproductive psychology). This selection of judges was intended to provide a diverse set of views about reproductive plans and experiences, as well as higher education and substantive knowledge in the field of reproductive psychology. The judges assessed whether the statements in the current version were semantically appropriate and understandable in the Polish cultural context. The greatest controversy was associated with the translation of the term "childbearing", which is understood in a literal Polish translation as the process of birth (delivery/labor/ parturition).
The content analysis of all statements in the questionnaire that contained this term (including the title and instructions) indicated unequivocally that they do not refer to delivery/ giving birth, but to the fact of having a child (i.e. being a mother). It was therefore decided to adopt the term "having a child" for the Polish language version of the scale title, and selected items, even though the term "childbearing" proposed by the authors of the original AFCS will be used in Englishlanguage publications. After minor revisions, the statements were translated back into Swedish (back-translation). In the final stage, both Swedish-language versions were compared, the differences were analyzed and the Polish language version, called AFCS-PL, was finally established.

Data Analysis
As it is recommended that exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) should be used with two different sample groups in scale adaptation studies (Cabrera-Nguyen 2010), the data analysis was conducted accordingly. In Study 1, the item-total correlations and Cronbach's alpha were first calculated to determine the discriminant validity and internal consistency of each subscale. The internal consistency was measured using Cronbach's alpha coefficients with a value above .70 indicating satisfactory reliability, as suggested by Nunnally and Bernstein (1994). In accordance with Field (2009), the item-total correlation was assumed to be over .30. The suitability of data for factor analysis (FA) was assessed with Bartlett's Test of Sphericity, assumed to be statistically significant at p ≤. 05 (Bartlett 1954), and the Kaiser-Meyer-Olkin Measure of Sampling Adequacy (KMO), whose loading is suggested as above .60 (Kaiser 1974).
Construct validity was tested using exploratory factor analysis (EFA) with the principal axis factoring (PAF) in the first step. As factors emerging from the data were expected to be correlated, a direct Oblimin rotation method was used to achieve a simpler structure for interpretation. The number of retained components was guided by Kaiser's criterion (eigenvalues >1), parallel analysis, and Catell's scree test (Cattell 1966) with inspection of the scree plot. Initially, all components with eigenvalue >1 and statements loading above .50 were retained. These analyses were conducted with the Statistical Package for Social Sciences, SPSS 24 (IBM Corp 2016).
In Study 2, construct validity and reliability were evaluated. CFA, based on the covariance matrix and the diagonally weighted least squares estimator, was used to confirm the hypothesized factor structure that was identified through EFA, as well as previously established models. As suggested by Schermelleh-Engell et al. (2003), the following indices were used for model fit evaluation: comparative fit index (CFI) ≥ .95, goodness fit index (GFI) ≥ .90, adjusted goodness fit index (AGFI) ≥ .90, root mean square error of approximation (RMSEA) < .08, Tucker-Lewis Index (TLI) and the ratio between χ2 statistical test to degrees of freedom (χ2/df) with a value less than two or three. Also, internal consistency reliability was assessed using Cronbach's alpha coefficient and corrected total-item correlations. Both CFA and the structural equation modeling (SEM) path diagram were conducted with the R Statistical Computing Environment (R Core Team 2017). In the following analyses, the criterion p < .05 was used to determine whether the results were statistically significant.

Descriptive Statistics and Exploratory Factor Analysis
The mean value for the total AFCS score was 171.75 with a standard deviation of 23.74. The correlation observed between the majority of items with the overall scale exceeded the recommended threshold of .30. Therefore, statements that correlated with the overall scale score below .30 were removed (a total of eight items).
In the next step, to examine the structure of the AFCS in the Polish sample, a principal axis factoring was conducted, where a value of KMO of 0.944 was observed: a value that is considered by Kaiser as excellent (Cerny and Kaiser 1977). Bartlett's Sphericity test [χ2 (820) = 7297.567; p < .001] proved to be statistically significant, which is also an indicator that the data was adequate for performing the factor analysis. Direct Oblimin rotation was performed as it was initially expected that the factors would correlate. Additionally, as Costello and Osborne (2005) and Field (2009) recommend, oblique rotation is more suitable for naturalistic data in which some correlation between components must be expected. The analysis revealed six components with eigenvalues larger than 1 (Kaiser's criterion), cumulatively explaining 66.5% of the variance. However, the parallel analysis and scree plot were slightly ambiguous and showed an obvious flattening beginning at Factor 4 (see Fig. 1). According to Furr and Bacharach (2013), the presence of an obvious flattening point suggests that the number of factors is one less than the factor number of the flattening point. This indicates the existence of a threefactor solution in the current study.
Besides, the three-factor model is closest to the original one, while the six-factor solution causes difficulties in interpretation. For this reason, the factor analysis was carried out again to extract a three-factor solution of the Polish version of the AFCS, retaining those items with factor loadings above .50. and removing those that did not reach the .50 threshold (15 items). Table 2 presents the factor loadings for this solution. The first factor had an eigenvalue of 19.3 (variance explained 47.14%), the second had an eigenvalue of 3.6 (variance explained 8.89%) and the third had an eigenvalue of 1.4 (variance explained 3.52%). These three factors explained 59.55% of the total variance. Cronbach's α exhibited acceptable internal consistency for each of the three factors: Factor 1 (eleven items) α = .98, Factor 2 (ten items) α = .93, Factor 3 (five items) α = .81 .
Finally, the Polish version of the instrument consisted of 26 statements. The content analysis and interpretation of the items led to the specification of the following subscales: Fertility and the child as an important value (Factor 1), Child as a barrier (Factor 2), and Personal awareness and responsibility concerning having a child (Factor 3).
The subscale Fertility and the child as an important value contains eleven statements associated with the present and future importance of being fertile and becoming a mother, both being regarded as essential parts of womanhood and the idea that having a child is an expected stage of life, e.g. It is important for me to be able to get pregnant in the future. High scores in this subscale indicate that the respondent wishes be able to become pregnant and look forward to having a child.
The subscale Child as a barrier includes ten statements which concern the perception of motherhood and giving birth in the context of their associated limitations, such as Having The subscale Personal awareness and responsibility concerning having a child includes five statements which refer to the conditions that are important for informed and responsible parenting planning, such as establishing a stable Note. The number of statements derived from the original Swedish version of the AFCS relationship, making decisions about having a child together with a partner and having the time to prepare to become a mother, e.g. Having children is a decision that I will make together with my partner. Women who achieve high scores in this subscale consciously plan their motherhood, make sure that it is a joint decision of both parents at the right moment in life.

Confirmatory Factor Analysis and Internal Consistency
To determine whether the three-factor model (Model 1) would fit the Polish AFCS data (N = 561), confirmatory factor analysis (CFA) was employed. Since items have a 5-point Likert scale, a diagonally-weighted least squares (DWLS) estimator was used, which is suitable for variables measured on an ordinal scale (Li 2016). The CFA was performed using two three-structure models, as proposed by the original authors, as well as using two other cultural adaptations. In total, the following five models were tested by CFA: 1) a three-factor model based on the results of the EFA conducted in the first stage of the current study (Study 1); 2) a three-factor model derived from the original tool development study (Söderberg et al. 2013); 3) a three-factor model derived from the original tool validation study (Söderberg et al. 2015); 4) a four-factor model derived from the Persian adaptation of the tool (Baezzat et al. 2017), in which four dimensions were distinguished (Children as the base of life, Child as a barrier, Postpone the fertility to future, Fertility after the fulfillment of preconditions); 5) a five-factor model derived from the Japanese adaptation of the tool (Miyata et al. 2017), in which five dimensions w e r e d i s t i n g u i s h e d ( P e r s o n a l d e v e l o p m e n t , Restrictedness, Avoidance of responsibility, Social Identity, Importance). Table 3 presents the goodness-of-fit indicators of models with a different factor structure.
The results indicate the best fits to be Model 1 and Model 2; therefore, the SEM analysis most closely reconstructs the factor structure of the 2013 model (Söderberg et al. 2013) and the model based on the sample of Polish women (Table 4). However, of these, Model 1 was more favourable as despite it being characterized by slightly weaker adjustment, it was based on the results of a factor analysis conducted previously with the participation of Polish women. The other models did not exceed either Model 1 or Model 2 in terms of goodness-offit indices.
The Polish version of the AFCS contained three factors that achieved satisfactory internal consistency, i.e. their Cronbach's alpha coefficients varied from .75 to .95. Pearson's correlation coefficients between factors are statistically significant (p < .01) and ranged from −.37 to .69 (see Table 4). As expected, the correlations between factors confirm the validity of the tool: women who reported a greater desire to be fertile and give birth, tended to plan for motherhood more consciously (r = .69; p <. 01) and perceived having a child at that moment as less of an obstacle (r = −.43; p <. 01).

Discussion
The present study evaluates the factor structure and psychometric properties of the Polish version of the Attitudes to Fertility and Childbearing Scale (AFCS). The results confirm that the Polish AFCS has a three-factor structure; however, the structure differs from that of the original version. The greatest difference relates to the third factor extracted in the Polish study. Despite some differences between the factors Fertility and the child as an important value and Child as a barrier in the Polish study and their counterparts in the original Swedish study, the two factors are generally similar; however, the third factor, named Personal awareness and responsibility concerning having a child, focuses on completely different aspects.
In studies with Swedish women, the perception of having a child as an aspect of social identification was associated with the third factor, female/social identity, two important aspects of which were the significance of being fertile and to feel communion with other women. Meanwhile, in studies involving Polish women, these items appear only as part of a different, more general dimension (i.e. Factor 1). This may be accounted for by the cultural differences in expectations related to the fulfillment of social roles by women and men in Poland: women have demonstrated that they should be treated equally with men at different levels, and by doing so, avoid falling into the trap of family and fertility values being closely identified with gender. Indeed, a recent study of Polish women indicates a strong belief that a woman can be fulfilled and feel satisfied without being a wife or a mother (Grabowska et al. 2017). However, such a belief reduces the likelihood of deciding to have an offspring. As Kluzowa and Slany (2004) noted, while childless women were once stigmatized, considered socially "useless" and excluded in some way from social life, career issues have since then acquired more central importance for family life, and partnerships without children have become more widely accepted. Such a change in social expectations towards women could have influenced the perception of fertility issues by Polish women as an aspect of their female identity.
In the Polish version of the AFCS, the third factor consists of items that indicate a deliberate and thoughtful approach to parenting planning. This aspect has been emphasized by the results of surveys conducted in recent years in Poland. For example, women asked about the "ideal moment" to give birth to a child most often emphasize that age alone does not matter as much as the fact of having adequate economic security (good, permanent job, good housing) and the psychological maturity for the role of a parent (CBOS 2017). It seems that these opinions were reflected in Factor 3 of the Polish version of the AFCS. Polish sociologists often emphasize that financial considerations play a crucial role when deciding to have children; for example, some participants of Polish studies have declared that "they would very often like to have children but cannot afford them" (Owsiejczyk 2008(Owsiejczyk -2009. However, some participants may use economic factors to justify other more deeply-held beliefs. A qualitative study with Polish women found the most widely-reported justifications for postponing parenthood to be the need to establish a partnership in a marriage what is a requirement for having children or to acquire the mental maturity and readiness to take on the role of a parent (Mynarska 2011). The participants declared that a well-paid, stable job and housing are prerequisites to having a child (Mynarska 2011).
Since the naming of the subscale is subjective, our choices may require some justification. The titles proposed for the subscales are based partly on the analysis of the content of particular items included in the subscale, and partly on the names of the scales from the original research (Söderberg et al. 2013;Söderberg et al. 2015). For example, Fertility and the child as an important value include items that refer to the issue of having a child at present or in the future and the perception of motherhood from the perspective of identification with other women. Hence a common general name has been proposed, which indicates what value the fertility and children have for a woman, regardless of her stage of life. A similar situation occurred in the case of choosing the name for the Child as a barrier. It was decided to emphasize that this factor is used to assess whether fertility and being a mother is a widespread obstacle to achieving life goals, irrespective of the stage of life.
The selection of the name for the last subscale in the Polish language version of the AFCS, Personal awareness and responsibility concerning having a child, was the most difficult one. This scale seems to be the most culturally embedded. Its statements highlight the individual and socio-economic conditions required to give birth to a child. Hence, despite a satisfactory match between the structures of the Polish and Swedish model, it was decided to adopt a model that would better represent the Polish context.
At this point, it is important to note the other changes resulting from cultural differences which were introduced in the Polish study, these being age and parity of participants. The women taking part in the Swedish study were 20-30 years of age and not mothers (Söderberg et al. 2013). The Polish study included women aged over 30 years old, and about 15% of the total number of respondents had children. These changes were motivated by the fact that in the public debate in Poland, the discussion concerning the motivation to have children and attitudes towards female fertility not only affects women at reproductive age without any childbirth experience but also those who already have children, regardless of their age. Therefore, it was decided to include the voices of both groups in the adaptation of the tool to better suit the AFCS to Polish conditions. However, this inconsistency in group formation may have influenced the differences obtained between the Polish version and the original. It is worth noting that changes to the inclusion criteria were also made in the adaptation studies performed on the Japanese version of the AFCS and the groups even included men (Miyata et al. 2017). Besides, while the women in the Polish study were also asked to give their preferred age limits for the birth of their first child, as in the original study, a "not applicable" option was also included in the question, which was not present in the Swedish studies. This was added following the comments of respondents participating in a pilot Polish study.

Study Limitations and Implications for Further Research
Despite the good psychometric values of AFCS-PL, this study has certain limitations that should be taken into consideration, both in the context of commentary on the obtained results and  (Andrews et al. 2003). With this in mind, it is difficult to say whether the fact that the majority of participants live in large, more technologically-advanced agglomerations may have resulted from the range of local recruitment, or the use of an online survey. On the other hand, it may have been advantageous to have the option of completing a survey of such a controversial and emotional nature topic online. Callegaro et al. (2015) recommend that the survey should be completed in a safe place, at a selected time and without pressure resulting from the interviewer's presence; this has been found to increase the response rates and reduce the risk of social desirability bias (Phillips and Clancy 1972). Secondly, although sexual orientation may affect attitudes towards motherhood and may have an influence on fertility decisions, the present study only involved heterosexual participants. A recent Polish study involving homo-, hetero-, and bisexual women (Cieślak et al. 2017) identified significant differences between participants in their attitudes concerning motherhood, as measured with the Childbearing Questionnaire by Miller 1995. For example, becoming a mother is more highly evaluated by bisexual women than others; homosexual women are more likely to recognize the more undesirable conditions of motherhood than bi-and heterosexual ones, and the highest motivation for having children has been observed among heterosexual women. Thus, further research is needed to verify the applicability of the Polish version of the AFCS for women with different sexual orientations.
Thirdly, to test the psychometric properties and factor structure identified in the current study, future studies should aim to recruit more diverse groups of participants, including general samples of varying sociodemographic backgrounds, as well as some clinical samples, such as women experiencing fertility difficulties, those who miscarried or women with illnesses influencing sexual and reproductive health i.e. vulvodynia.
Fourthly, the current study had a cross-sectional design. Future longitudinal research is recommended to further validate the Polish version of the AFCS, including the test-retest reliability of longitudinal invariance of the factor structure. Finally, our study did not examine whether the Polish language version of the AFCS was psychometrically equivalent to the original Swedish language version, thus further validation studies should test the psychometric equivalence between the two versions using a sample of a bilingual individual.

Conclusions
The Polish version of the AFCS has good psychometric properties and is a reliable and valid tool. Although more research is needed to strengthen validation of the AFCS-PL, current findings suggest that this tool is a reasonably comprehensive instrument for assessing the factors that may affect the decision to have children or not among Polish women. The AFCS-PL may prove to be a useful tool for researchers interested in identifying the personal enablers and hindrances of being a mother, and for family policy decision-makers.

Compliance with Ethical Standards
Conflict of Interests On behalf of all authors, the corresponding author states that there is no conflict of interest. Note. Entries on the main diagonal are Cronbach's alpha **p < .01 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.