Table I.

General features of participants in the study: Comparison between groups and subgroups.

Variable	No. patients (n)	Mean ± SD	Range	Subgroup (n)	Mean ± SD
1st IVF cycle
Age	40	40.3±1.48	37-42	A1 (10)	40.4±1.58
				A2 (10)	40.5±1.58
				B1 (10)	40.2±1.39
				B2 (10)	40.1±1.59
Body mass index	40	23.1±1.60	20-25	A1 (10)	23.0±1.89
				A2 (10)	23.2±1.62
				B1 (10)	23.4±1.43
				B2 (10)	22.9±1.66
b-FSH (IU/l)	40	12.7±2.30	8.1-16.4	A1 (10)	12.7±2.48
				A2 (10)	13.6±2.13
				B1 (10)	12.2±1.81
				B2 (10)	12.3±2.75
b-AMH (μg/l)	40	0.5±0.28	0.1-0.9	A1 (10)	0.5±0.29
				A2 (10)	0.5±0.29
				B1 (10)	0.6±0.27
				B2 (10)	0.5±0.28
b-17β estradiol (nmol/l)	40	0.2±0.06	0.29-0.19	A1 (10)	0.2±0.06
				A2 (10)	0.2±0.06
				B1 (10)	0.2±0.05
				B2 (10)	0.2±0.05
Antral follicle count	40	5.0±1.86	2-9	A1 (10)	4.8±1.81
				A2 (10)	4.3±1.77
				B1 (10)	5.9±1.85
				B2 (10)	5.2±1.93
2nd IVF cycle
Age	35	40.3±1.55	37-42	A1 (8)	39.6±1.59
				A2 (8)	40.7±1.39
				B1 (10)	40.2±1.68
				B2 (9)	40.6±1.50
Body mass index	35	23.2±1.58	20-25	A1 (8)	23.7±1.28
				A2 (8)	23.0±1.51
				B1 (10)	22.7±1.63
				B2 (9)	23.6±1.80
b-FSH (IU/l)	35	12.5±2.19	9.2-16.0	A1 (8)	12.8±2.32
				A2 (8)	13.3±2.05
				B1 (10)	12.3±2.18
				B2 (9)	11.8±2.31
b-AMH (μg/l)	35	0.4±0.28	0.1-0.9	A1 (8)	0.5±0.28
				A2 (8)	0.3±0.31
				B1 (10)	0.5±0.22
				B2 (9)	0.4±0.29
b-17β estradiol (nmol/l)	35	0.2±0.06	0.11-0.29	A1 (8)	0.2±0.05
				A2 (8)	0.2±0.06
				B1 (10)	0.2±0.06
				B2 (9)	0.2±0.07
Antral follicle count	35	4.5±1.85	2-9	A1 (8)	5.1±1.72
				A2 (8)	3.6±1.50
				B1 (10)	4.9±2.08
				B2 (9)	4.5±1.94

SD, standard deviation; b-, basal; FSH, follicle stimulating hormone; AMH, anti-mullerian hormone; IVF, in vitro fertilisation.