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Ovarian stimulation length, number of follicles higher than 17 mm and estradiol on the day of human chorionic gonadotropin administration are risk factors for multiple pregnancy in intrauterine insemination

  • Original Article
  • Gemetogenesis
  • Published:
Reproductive Medicine and Biology

Abstract

Aim

The aim of the present study was to identify the risk factors, their prognostic value on multiple pregnancies (MP) prediction and their thresholds in women undergoing controlled ovarian hyperStimulation (COH) with follicle stimulating hormone (FSH) and intrauterine insemination (IUI).

Methods

A case-control study was carried out by identifying in our database all the pregnancies reached by donor and conjugal IUI (DIUI and CIUI, respectively), and compared cycle features, patients’ characteristics and sperm analysis results between women achieving single pregnancy (SP) versus MP. The number of gestational sacs, follicular sizes and estradiol levels on the human chorionic gonadotropin (hCG) administration day, COH length and semen parameters were obtained from each cycle and compared. Student’st-tests for mean comparisons, receiver-operator curve (ROC) analysis to determine the predictive value of each parameter on MP achievement and multiple regression analysis to determine single parameter influence were carried out.

Results

Women with MP in IUI stimulated cycles reached the adequate size of the dominant follicle (17 mm) significantly earlier than those achieving SP. Also, the mean follicles number, and estradiol levels on the hCG day were higher in the CIUI and DIUI MP group. Nevertheless, only ROC curve analysis revealed good prognostic value for estradiol and follicles higher than 17 mm. Multiple regression analysis confirmed these results. No feature of the basic sperm analysis, either in the ejaculate or in the prepared sample, was different or predictive of MP. When using donor sperm, different thresholds of follicle number, stimulation length and estradiol in the prediction of MP were noted, in comparison with QUI.

Conclusions

MP in stimulated IUI cycles are closely associated to stimulation length, number of developed follicles higher than 17 mm on the day of hCG administration and estradiol levels. Also, estradiol has a good predictive value over MP in IUI stimulated cycles. The establishment of clinical thresholds will certainly help in the management of these couples to avoid undesired multiple pregnancies by canceling cycles or converting them intoin vitro fertilization procedures.

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Authors and Affiliations

  1. Instituto Universitario IVI, Valencia, Spain

    Nicolás Garrido, Marco A. B. Melo, Carlos Simón, José Remohí, Antonio Pellicer & Marcos Meseguer

Authors
  1. Nicolás Garrido
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  2. Marco A. B. Melo
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  3. Carlos Simón
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  4. José Remohí
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  5. Antonio Pellicer
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  6. Marcos Meseguer
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Correspondence to Nicolás Garrido.

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Garrido, N., Melo, M.A.B., Simón, C. et al. Ovarian stimulation length, number of follicles higher than 17 mm and estradiol on the day of human chorionic gonadotropin administration are risk factors for multiple pregnancy in intrauterine insemination. Reprod Med Biol 6, 19–26 (2007). https://doi.org/10.1111/j.1447-0578.2007.00160.x

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  • DOI: https://doi.org/10.1111/j.1447-0578.2007.00160.x

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