Table 1. Demographic and clinical characteristics of women undergoing IVF
Parameter	Mean	SD
Age (years)	35.3	3.83
Infertility (years)	4.2	3.22
Menstrual cycle length (days)	28.9	3.64
Ethnic origin, N (%)    Caucasian    Hispanic    African-American	29 (43.9%) 36 (54.5%) 1 (1.5%)
Parity (number of children)	0.48	0.84
Body mass index (kg/m2)	24.1	3.28
Weight (kg)	63.9	9.88
Height (m)	1.62	0.06