Endocrine Abstracts

This is a retrospective study performed by single physician at single primary fertility center. From January 2023 to September 2024, 994 cycles of ET procedures were performed. They were 648 fresh ET cycles, 346 ET cycles. For fresh ET, Q1 contained P4 level between 5.65 to 32.9ng/dl. Their age was 39.7±4.6 years old, and 4.44±5.60 oocytes were obtained, 1.87±0.74 embryos were transferred and clinical pregnancy rate were 27.2% (44/162). Q2 contained P4 level between 33.2 to 54.5ng/dl. Their age was 38.8±4.3 years old, and 6.26±4.29 oocytes were obtained, 2.28±0.71 embryos were transferred and clinical pregnancy rate were 33.9% (55/162). Q3 contained P4 level between 54.7 to 97.0ng/dl. Their age was 37.6±4.3 years old, and 9.43±4.53 oocytes were obtained, 2.27±0.65 embryos were transferred and clinical pregnancy rate were 46.9% (77/162). Q4 contained P4 level between 97.2 to 405.0ng/dl. Their age was 36.1±4.0 years old, and 14.15±5.86 oocytes were obtained, 1.99±0.66 embryos were transferred and clinical pregnancy rate were 55.6% (90/162). Clinical pregnancy rate was statistically different between quartile groups. (P < 0.01) For frozen ET, Q1 contained P4 level between 2.90 to 13.78ng/dl. Their age was 36.3±4.2 years old, 1.95±0.74 embryos were transferred and clinical pregnancy rate were 48.3% (42/87). Q2 contained P4 level between 13.79 to 18.80ng/dl. Their age was 36.6±4.2 years old, 1.95±0.73 embryos were transferred and clinical pregnancy rate were 50.6% (44/87). Q3 contained P4 level between 18.81 to 26.10ng/dl. Their age was 36.3±3.8 years old, 1.82±0.75 embryos were transferred and clinical pregnancy rate were 43.7% (38/87). Q4 contained P4 level between 26.11 to 113.0ng/dl. Their age was 35.8±4.2 years old, 1.75±0.66 embryos were transferred and clinical pregnancy rate were 52.9% (46/87). Clinical pregnancy rate was not statistically different. (P > 0.01)