Table 2.

Serum progesterone (P4) levels for each drug on the embryo transfer day

Drug	Lutinus n=63	Utrogestan n=60	Luteum n=56	Crinone n=56	P value
P4 levels (ng/mL)	13.3 ± 4.9	9.3 ± 3.3	13.6 ± 4.2	8.7 ± 3.2	<0.001

Data are presented as mean ± SD