Influence of years of infertility on FET outcomes in women of reproductive age under 30 years of age
Objective To investigate the influence of infertility duration on the outcomes of frozen-thawed embryo transfer(FET)in women under 30 years old.Methods A retrospective analysis was conducted on 540 FET cycles at reproductive center.The cycles were categorized into clinical pregnancy and non-clinical pregnancy groups based on the occurrence of clinical pregnancy.Furthermore,patients were stratified into four groups based on infertility duration:Group A(1-2 years),Group B(3-4 years),Group C(5-6 years),and Group D(7-8 years).Differences in baseline characteristics and clinical pregnancy outcomes among the groups were analyzed.Results Baseline characteristics showed statistical significance only in age differences among the groups(P<0.05),with no other significant differences.The clinical pregnancy rate(33.93%)and embryo implantation rate(25%)in group C were the lowest,but only the difference in clinical pregnancy rate was statistically significant(P<0.05).Early miscarriage rates did not show significant differences among the four groups.Conclusion Infertility duration has a discernible impact significant impact on clinical pregnancy rate of FET in women under 30 years old.However,the effect does not linearly increase with longer infertility duration.