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    Impact of trophoectoderm biopsy for preimplantation genetic testing on serum ß-hCG levels, time of delivery and birthweight following frozen embryo transfer cycles
    (Taylor & Francis Ltd, 2023) Ozdamar, Ozkan; Boynukalin, F. Kubra; Gultomruk, Meral; Yarkiner, Zalihe; Findikli, Necati; Bahceci, Mustafa
    Aim: This study investigated whether trophoectoderm (TE) biopsy adversely impacts serum ss-human chorionic gonadotropin (hCG) level on the 15th day of embryo transfer (ET), delivery week and birthweight, between biopsied and unbiopsied embryo groups, in a cohort of women who delivered a singleton baby, following frozen-thawed ET. Methods: All women having had a live birth after blastocyst ET s following frozen ET cycles with preimplantation genetic testing (PGT) were included. A control group was selected among women who had a live birth following single frozen blastocyst transfer without PGT-A at the same period in our clinic Results: One hundred fifteen and 173 cycles with- and without-PGT, respectively, were included. Serum ss-hCG level on the 15th day after ET was comparable between the groups (p =.336). Average birthweight of the babies born following biopsied embryos were significantly lower (3200 vs. 3380; p =.027). Women who received trophectoderm biopsied embryos had a significantly higher probability of having a baby weighing <= 1500 g and 1500-2500 g (p =.022) or <= 2500 g (p =.008). Proportion of preterm delivery was significantly higher in the biopsy group (p =.023). However, after adjusting for potential covariates, trophectoderm biopsy did not seem to increase the risk of preterm birth (OR 1.525; 95% CI, 0,644-3.611; p =.338) Conclusions: TE biopsy does not seem to impact serum ss-hCG level on the 15th day after ET. Average birthweight is lower when a biopsied embryo was transferred. After adjusting for potential covariates, trophectoderm biopsy does not seem to increase the risk of preterm birth