Table 2. ICSI. Variables associated with pregnancy likelihood according to estradiol concentration in pregnant and non-pregnant women <=39 years (average).
Variables	<200pg/ml			200-500pg/ml			>500pg/ml
	P	NP	p	P	NP	p	P	NP	p
Age	30.66±5.18	32.77±3.61	0.2014	33.65±3.88	33.30±3.39	0.3697	32.27±3.49	33.68±3.49	0.1013
Collected oocytes	12.83±6.43	14.22±7.28	0.3649	15.75±12.45	10±6.90	0.0195	11.60±7.81	14.53±8.04	0.1069
Injected M2 oocytes*	7.57±4.13	10.00±7.26	0.2420	10.25±7.04	7.84±6.38	0.0891	8.57±4.48	9.57±5.15	0.2372
Embryos D3	4.50±2.21	7.22±6.92	0.2012	7.23±5.26	5.18±4.60	0.0143	6.57±3.87	6.94±5.47	0.3904
Transferred embryos	2.66±0.47	2.44±0.68	0.2651	2.80±0.74	2.30±0.75	0.0134	2.45±0.78	2.47±0.68	0.4654
Day of transfer	3.33±0.47	3.44±0.49	0.3467	3.35±0.72	3.24±0.77	0.4096	3.52±0.84	3.72±0.80	0.2199
Type of transfer**	1.66±0.74	1.33±0.47	0.1707	1.25±0.62	1.48±1.01	0.1827	1.18±0.45	1.47±0.75	0.0471
E2 (pg/ml) in MLP	132.42±52.23	105.11±53.55	0.1897	356.16±86.08	325.17±77.34	0.0968	1444.98±1185.60	662.66±119.04	0.0042
βHCG (mUI/ml) in MLP	10.05±8.44	0.312±0.40	0.0247	10.59±8.98	0.79±1.43	0.0001	19.30±11.54	1.12±2.09	0.0001
E2=estradiol, MLP=mid-luteal phase (transfer day+7, TD7), βHCG=chorionic gonadotropin, * injected or inseminated,  ** Human embryo transfer classification 2.