Abstract
Purpose
To evaluate the cytogenetic risk of assisted reproductive technology (ART) by comparing the incidence of de novo chromosomal abnormalities between fetuses conceived via in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) and natural conception.
Materials and methods
Prenatal invasive diagnostic testing (amniocentesis and cytogenetic analysis) was performed on 1496 fetuses conceived via IVF/ICSI (IVF/ICSI group) and 1396 fetuses from natural conception (NC group). The incidence of de novo chromosomal abnormalities (including aneuploidy and chromosomal structure abnormalities) was used to evaluate the cytogenetic risk of ART. For statistical analysis, χ2-test was used for binary dependent variable. The significance level was P < 0.05 and confidence interval was 95%.
Result(s)
The IVF/ICSI group displayed a modest increase in the overall de novo chromosomal abnormality rate compared with that in the NC group but with no statistical significance (6.75% vs. 6.16%; χ2 = 0.42, P > 0.05). The incidence of abnormal karyotypes was also not significantly different between the IVF/ICSI and NC groups in different maternal ages, including ≥ 35 years group (7.55% vs. 9.60%, χ2 = 1.40, P > 0.05) and < 35 years group (6.20% vs. 4.54%, χ2 = 2.51, P > 0.05). Moreover, there was no difference in the proportion of aneuploid and structural abnormalities in detected karyotypes between the IVF/ICSI and NC groups. Logistic regression analysis showed no significant association between the method of pregnancy and de novo chromosomal abnormalities (odds ratio (OR) 1.03; 95% CI 0.71–1.50; P = 0.86) after adjusting for other confounding factors.
Conclusion(s).
Fetuses conceived via IVF/ICSI had a slight but not statistically significant increase in de novo abnormal karyotypes compared to those in naturally conceived fetuses. Our findings indicate no significant association between de novo fetal chromosomal abnormalities and the pregnancy method in high-risk pregnancies in the second trimester. For these pregnancies with a high risk but with a normal karyotype, further genetic testing is required for diagnosis.
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Acknowledgements
We thank all members of the Prenatal Diagnosis Center of Reproductive and Genetic Hospital of CITIC–Xiangya for their invaluable efforts.
Funding
This work was supported by grants from the National Key Research & Developmental Program of China (2018YFC1004901), the National Natural Science Foundation of China (82171608 and 81971447), the Key Grant of Prevention and Treatment of Birth Defect from Hunan Province (2019SK1012), Hunan Provincial Grant for Innovative Province Construction (2019SK4012), the Research Grant of CITIC-Xiangya (YNXM-202004, YNXM-202006), and the Changsha Municipal Natural Science Foundation (YWXM-202209).
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SM.Y and LL.G conceived the study and drafted the manuscript; DH.C performed chromosome analysis; XR.L, H.H, and L.H designed the study and recruited the patients; GX.L, G.L, F.G, and YQ.T designed the study and revised the manuscript. YQ.T approved the final version of the manuscript for submission with input from all the authors.
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Yuan, S., Guo, L., Cheng, D. et al. The de novo aberration rate of prenatal karyotype was comparable between 1496 fetuses conceived via IVF/ICSI and 1396 fetuses from natural conception. J Assist Reprod Genet 39, 1683–1689 (2022). https://doi.org/10.1007/s10815-022-02500-5
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DOI: https://doi.org/10.1007/s10815-022-02500-5