Table 1. Baseline characteristics of PCOS patients categorized by luteinizing hormone levels: upper 50% (7.1-29.0 IU/L) vs. lower 50% (1.0-7.0 IU/L).

Variable	Lower 50% LH, (n=38)	Upper 50% LH, (n=38)	p-value
Female age (years)	29.9±3.7	30.9±2.7	0.21
Duration of infertility (years)	3.2±2.6	3.0±2.1	0.82
Parity	0.2±0.5	0.2±0.5	0.82
Gravidity	0.7±0.9	0.6±1.1	0.65
Baseline FSH (IU/L)	5.4±1.5	5.9±1.3	0.15
Baseline LH (IU/L)	4.2±1.4	13.0±5.7	0.001
Baseline estradiol (pmol/L)	193.6±121.3	277.6±364.2	0.20
Prolactin (mcg/L)	10.0±3.5	10.7±5.6	0.50
TSH (mIU/L)	2.2±1.8	3.3±8.2	0.40
Total testosterone (nmol/L)	1.4±0.9	1.9±0.9	0.02
Free testosterone (nmol/L)	0.6±0.5	0.9±0.5	0.03
Antral follicle count	42.3±15.2	50.9±22.6	0.09
Male age (years)	33.7±5.6	34.7±4.9	0.46
Sperm concentration (mil/mL)	38.8±32.3	41.4±36.9	0.75
Ejaculate volume (mL)	2.6±1.2	2.7±1.3	0.61
Semen motility (%)	40.1±26.6	44.9±27.6	0.46
Total motile sperm count (Mil)	53.4±77.7	75.1±97.7	0.31
FSH total dose (IU)	1287.1±518.4	1311.2±458.5	0.84
Peak estradiol during stimulation (nmol/L)	10980.1±4760.9	13982.7±6613.4	0.03
Peak endometrial thickness (mm)	10.1±2.0	10.3±2.1	0.81

Data are presented as mean ± standard deviation, PCOS: Polycystic ovary syndrome, LH: Luteinizing hormone, FSH: Follicle-stimulating hormone, TSH: Thyroid stimulating hormone