Journal
JOURNAL OF OBSTETRICS AND GYNAECOLOGY RESEARCH
Volume 48, Issue 10, Pages 2563-2570Publisher
WILEY
DOI: 10.1111/jog.15369
Keywords
blastocyst; cleavage embryo; frozen-thawed embryo transfer; sequential embryo transfer
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Funding
- basic public welfare research program of Zhejiang Province of China [LGF20H040012]
- medical and health clinical research project of Zhejiang Province of China [2021KY525]
- Zhejiang Provincial People's Hospital. Furthermore
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In patients with RIF, sequential embryo transfer did not improve clinical outcomes, and there were no significant differences in clinical pregnancy and ongoing pregnancy rates among the three groups.
Aim To explore whether sequential embryo transfer benefits patients with repeated implantation failure (RIF) undergoing frozen-thawed embryo transfer (FET) cycles. Methods We included 311 patients with a history of RIF in this retrospective study. We did sequential transfers with a cleavage embryo on day 3 and a blastocyst on day 5 in 77 patients; blastocyst transfers with two blastocysts on day 5 in 80 patients; and cleavage embryo transfers with two cleavage embryos on day 3 in 154 patients. We compared clinical outcomes between the three groups. Results The clinical pregnancy rate was comparable between the blastocyst transfer group (48.8%), the sequential transfer group(48.1%) and the cleavage embryo transfer group (48.1%). There was no statistically significant difference found (p > 0.05). The ongoing pregnancy and multipregnancy rates were also comparable between the three groups (p > 0.05). The early miscarriage rate was significantly higher in the sequential transfer group (32.4%) compared with the blastocyst group (12.8%) and the cleavage embryo group (12.2%) (p < 0.05). However, after adjusting for confounders, there was no significant difference in early miscarriage rates in the sequential transfer group compared with the blastocyst group (odds ratio [OR], 2.97; 95% confidence interval [CI], 0.85-9.24; p = 0.07) and the cleavage embryo group (OR, 3.03; 95% CI, 0.94-8.06; p = 0.08). Conclusions Sequential embryo transfer failed to improve clinical outcomes for patients with RIF.
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