Thanks to recent advances in clinical practice and laboratory, embryo cryopreservation has become the first-line procedure in assisted reproductive technology. Improved laboratory techniques have increased the number of available embryos derived from an in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI) cycle. Implementation of a single embryo transfer policy to improve vitrification, improve postwarm embryo survival rates, and reduce multiple pregnancies without reducing cumulative birth rates has contributed to an increase in the number of frozen-warms (1,2) Embryo freezing; It is becoming an adopted practice for an increasing number of indications, including prevention of ovarian hyperstimulation syndrome, preimplantation genetic testing (PGT), late follicular phase progesterone elevation, and embryo-endometrial asynchrony. In our study, we are investigating the effect of pre-transfer serum progesterone levels on pregnancy outcomes in patients who underwent frozen-thawed embryo transfer.Supplementary progesterone preparations can be used to prevent luteal phase defect and to provide progesterone support in cycle preparations for frozen-thawed embryo transfer(3). The aim in this study is to show the effect of serum progesterone level on the pregnancy results on the day of embryo transfer in natural cycles.
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Clinical pregnancy rates
Timeframe: average of 1 year