Table 2.

Baseline and clinical characteristics of patients.

Characteristics	Group 1 (1-3 oocytes)			Group 2 (4-9 oocytes)			Group 3 (10-15 oocytes)			Group 4 (>15 oocytes)
Age (years)	34.23±5.37	36.73±4.80	<0.001	33.1±5.02	34.18±4.75	<0.001	31.5±4.25	32.04±4.43	0.003	30.67±4.40	30.48±4.12	0.319
Duration of infertility (years)	5.3±3.67	6.56±4.14	0.006	5.67±3.99	6.06±3.97	0.029	5.24±3.39	5.73±3.66	<0.001	5.15±3.22	5.04±3.14	0.447
Type of infertility (n;%) Primary Secondary	157 (67.7) 75 (32.3)	75 (63.0) 44 (37.0)	0.383	727 (67.0) 358 (33.0)	663 (67.2) 324 (32.8)	0.935	760 (69.7) 330 (30.3)	852 (72.6) 322 (27.4)	0.135	534 (70.2) 227 (29.8)	1306 (73.2) 477 (26.8)	0.112
Previous IVF attempts (n)	1.19±0.93	1.20±0.65	0.927	1.13±0.41	1.15±0.76	0.505	1.15±0.51	1.13±0.68	0.559	1.13±0.42	1.14±0.85	0.915
Indications for IVF (n;%) Tubal factor Male factor Female factor Ovulation disorder Endometriosis Unexplained infertility Others	28 (12.1) 90 (39.0) 64 (27.7) 3 (1.3) 0 (0.0) 4 (1.7) 42 (18.2)	7 (5.9) 42 (35.3) 46 (38.7) 0 (0.0) 0 (0.0) 0 (0.0) 24 (20.2)	0.084**	153 (14.1) 514 (47.4) 203 (18.7) 8 (0.7) 6 (0.6) 9 (0.8) 191 (17.6)	126 (12.8) 426 (43.2) 211 (21.4) 6 (0.6) 4 (0.4) 6 (0.6) 206 (20.9)	0.228	184 (16.9) 588 (53.9) 90 (8.3) 8 (0.7) 5 (0.5) 9 (0.8) 206 (18.9)	173 (14.8) 634 (54.1) 82 (7.0) 21 (1.8) 3 (0.3) 6 (0.5) 252 (21.5)	0.085	97 (12.7) 453 (59.5) 41 (5.4) 11 (1.4) 4 (0.5) 4 (0.5) 151 (19.8)	241 (13.5) 1025 (57.5) 65 (3.6) 83 (4.7) 2 (0.1) 14 (0.8) 352 (19.8)	<0.001
Antral Follicle Count (n)	10.83±6.96	7.73±5.20	0.001	12.14±6.62	10.59±6.59	<0.001	17.18±8.00	15.66±8.18	0.001	19.66±8.17	21.78±9.74	<0.001
AMH (ng)	1.7 (1.1-2.9)	1.6 (1.0-2.5)	0.231*	2.3 (1.4-3.8)	2.4 (1.7-3.8)	0.02*	3.7 (2.5-5.2)	3.9 (2.6-5.8)	0.01*	4.8 (3.3-6.9)	6.3 (4.2-9.1)	<0.001*
Days of ovarian stimulation (n)	10.2±1.48	10.33±1.63	0.466	10.15±1.35	10.06±1.22	0.082	10.2±1.26	10.07±1.16	0.010	10.25±1.08	10.29±1.19	0.440
Total gonadotropin dose (IU)	2749.13± 765.5	2973.89± 678.46	0.006	2742.03± 743.62	2809.55± 657.56	0.031	2500.46± 808.11	2538.39± 799.4	0.273	2227.7± 823.94	2105.87± 844.82	<0.001
On hCG trigger day Estradiol level (pg/ml)	1796	1584	0.044*	2090	2000	0.217*	2873	2678	0.076*	3316	3956	<0.001*
	(1208-2782)	(1194-2133)		(1431-3253)	(1440-2960)		(1948-4068)	(1901-4032)		(2301-6638)	(2740-7787)
Progesterone level (ng/ml)	0.7	0.8	0.608*	0.8	0.8	0.554*	0.9	0.9	0.014*	0.9	1.1	<0.001*
	(0.5-1.0)	(0.5-1.0)		(0.6-1.1)	(0.6-1.1)		(0.6-1.2)	(0.7-1.3)		(0.7-1.2)	(0.8-1.5)
Endometrial thickness (mm)	10.83±1.5	10.41±1.06	0.003	10.78±1.35	10.35±1.03	<0.001	10.91±1.36	10.37±1.01	<0.001	10.93±1.31	10.33±0.98	<0.001
Oocytes retrieved (n)	2.44±0.72	2.52±0.64	0.254	6.61±1.71	6.87±1.64	<0.001	12.34±1.66	12.3±1.72	0.595	19.09±3.12	22.84±6.59	<0.001
Metaphase II oocytes (n)	1.93±0.78	2.26±0.67	<0.001	5.43±2.08	5.96±1.72	<0.001	10.36±2.47	10.4±2.35	0.739	15.22±3.66	19.18±5.85	<0.001
Fertilization Rate	0.79±0.25	0.82±0.26	0.316	0.71±0.23	0.73±0.21	0.050	0.70±0.20	0.71±0.18	0.504	0.70±0.18	0.73±0.16	0.012
Cleavage Rate	1.0 (1.0-1.0)	1.0 (1.0-1.0)	0.015	1.0 (0.8-1.0)	0.8 (0.7-1.0)	<0.001	0.8 (0.7-1.0)	0.8 (0.6-0.9)	0.003*	0.8 (0.6-0.9)	0.8 (0.6-0.9)	0.429*
High-score embryos on Day 3 (n)	1 (0 - 1)	0 (0 - 1)	0.310*	1 (0 - 2)	1 (0 - 2)	0.660*	2 (0 - 4)	1 (0 - 2)	<0.001*	3 (0 - 7)	2 (0 - 3)	<0.001*
Average embryos transferred (n)	1.71±0.77	1.78±0.70	0.442	2.58±0.79	2.53±0.70	0.074	2.88±0.57	2.71±0.57	<0.001	2.97±0.45	2.84±0.49	<0.001
Embryos frozen (n)	1.25±0.77	1.77±0.73	<0.001	3.44±1.55	3.47±1.49	0.705	5.76±2.23	5.62±2.33	0.145	8.2±3.29	10.52±4.78	<0.001