Fig. 1From: Progesterone elevation on the day of human chorionic gonadotropin administration adversely affects the outcome of IVF with transferred embryos at different developmental stagesRelationship between serum progesterone levels and CPRs in the day 3 ET group (a) Relationship between serum progesterone levels and CPRs, (b) CPRs according to serum progesterone levels. *p < 0.05 for comparison with the previous progesterone group; data are expressed as the OR (95 % CI) for each serum progesterone group compared with the group with the lowest progesterone level (<0.5 ng/ml); OR: odds ratio; CI: confidence intervalBack to article page