Problem: The aim of this research was to investigate the effects of the intrauterine perfusion of hCG before a frozen-thawed embryo transfer (FET) in women with different implantation failure numbers.
Method of study: This was a retrospective analysis of patients undergoing FET who received an intrauterine injection hCG 1000 IU before embryo transfer. The groups included women with their first implantation failure (A group, n = 26), second implantation failure (B group, n = 122), and three or more failures (C group, n = 77). Corresponding control groups (no infusion) were also included. The pregnancy rates were compared among these groups.
Results: After intrauterine injection hCG, the biochemical pregnancy rates were 92.30%, 63.11%, 49.02%, and the clinical pregnancy rates were 76.92%, 54.91%, 48.05%, in the A, B, and C groups, respectively. The biochemical and clinical pregnancy rates were significantly higher in the A group than in the other groups (P < .05). The clinical pregnancy rates of the A and C groups were significantly higher than in the corresponding (no infusion) control groups (76.92% vs 56.81% and 48.05% vs 33.33%, P < .05).
Conclusion: Pregnancy rates decreased with the number of transplant failures. The intrauterine administration of hCG before FET significantly improved the pregnancy rates, especially after one and three or more implantation failures.
Keywords: IVF; hCG; implantation failures; intrauterine perfusion.
© 2017 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.