Fig. 1From: Association between serum progesterone levels on the day of frozen-thawed embryo transfer and pregnancy outcomes after artificial endometrial preparationCrude and adjusted odds ratios of pregnancy outcomes in serum progesterone Q1 (< 7.9 ng/mL) group compared with the Q2–Q4 (≥ 7.9 ng/mL) group. Abbreviations: Abbreviations: hCG = human chorionic gonadotropinBack to article page