Table 2.

Median serum estradiol (pg/mL) and progesterone (ng/mL) levels in patients with singleton births

Cycle day	Estradiol (pg/mL)	P	Progesterone (ng/mL)	P
28 (GA: 4 weeks)	415	–	28.125	–
29	347	0.09	26.4	0.007*
30	482.5	< 0.001*	28.7	0.53
31	400	0.32	26.7	0.25
32	464.5	0.17	27.1	0.07
33	450	0.46	27.71	0.02*
34	501	0.001*	28	0.42
35 (GA: 5 weeks)	427	0.93	27.2	0.27
36	542	< 0.001*	28.25	0.08
37	490.5	0.009*	28.2	0.41
38	545	< 0.001*	27.95	0.16
39	544.35	< 0.001*	28.1	0.45
40	592.5	< 0.001*	29	0.74
41	557	< 0.001*	29.2	0.90
42 (GA: 6 weeks)	634	< 0.001*	28.9	0.88
43	677	< 0.001*	30.05	0.33
44	715	< 0.001*	30.1	0.30
45	703	< 0.001*	28.4	0.90
46	776	< 0.001*	27.1	0.11
47	774	< 0.001*	30.55	0.74
48	770	< 0.001*	31.6	0.02*
49 (GA: 7 weeks)	776	< 0.001*	32.15	0.03*
50	921	< 0.001*	30.8	0.13
51	883	< 0.001*	32.6	0.07
52	1007	< 0.001*	30.85	0.04*
53	948	< 0.001*	29.25	0.04*
54	973	< 0.001*	31	0.26
55	914	< 0.001*	31.45	0.002*
56 (GA: 8 weeks)	1113	< 0.001*	34.05	< 0.001*
57	1110	< 0.001*	31.35	0.05*
58	1165	< 0.001*	33.37	0.004*
59	1120	< 0.001*	32.1	0.003*
60	1212	< 0.001*	31.5	0.009*

Data are presented as medians

GA gestational weeks