Relationship of follicle number, serum estradiol level, and other factors to clinical pregnancy rate in gonadotropin-induced intrauterine insemination cycles

Abstract Objective:To determine the characteristics associated with clinical pregnancy rate after gonadotropin-induced intrauterine insemination cycles in patients without male or tubal factor infertility. Materials and methods:One hundred and eighty patients undergoing controlled ovarian hyperstimulation followed by intrauterine insemination were included in the study retrospectively. The patients’ files were retrospectively evaluated with respect to age, number of follicles, endometrial thickness and serum hormone levels at baseline and at the day of human chorionic gonadotropin (hCG) administration. The patients with male or unilateral tubal factor infertility were excluded from the study. Results:The serum estradiol level at the day of hCG administration was not correlated with the clinical pregnancy rate (r=–0.05, p=0.481). The number of follicles was not correlated with the clinical pregnancy rate (r=–0.09, p=0.209). There was no significant difference between the clinically pregnants (n=32) and not pregnants (n=148) regarding the mean age, baseline serum levels of luteinizing hormone (LH) and estradiol, serum estradiol and LH levels at the day of hCG administration and endometrial thickness (p>0.05). Although not statistically significant, a pregnancy rate of 14.2% with less than 3 follicles ≥18 mm is present compared to a pregnancy rate of 27.5% with at least 3 follicles ≥18 mm and 24% with ≥4 follicles ≥18 mm. Conclusion: The clinical pregnancy rate does not seem to be affected with the number of follicles present at the time of intrauterine insemination or the serum estradiol level at the day of hCG administration in a controlled ovarian hyperstimulation cycle in non-andrologic and non-peritubal factor infertility; however, there is a clear trend towards higher pregnancy rates with higher number of follicles. Similar content being viewed by others Author information Authors and Affiliations Additional information Received: 8 December 2000 / Accepted: 19 February 2001 Rights and permissions About this article Cite this article Özçakir, H., Tavmergen Göker, E., Terek, M. et al. Relationship of follicle number, serum estradiol level, and other factors to clinical pregnancy rate in gonadotropin-induced intrauterine insemination cycles. Arch Gynecol Obstet 266, 18–20 (2002). https://doi.org/10.1007/PL00007493 Issue date: DOI: https://doi.org/10.1007/PL00007493