Table 1.

Body composition and serum hormone levels relative to menarche

	Maturational stage
	3 years to 1 year before menarche	Within 1 year of menarche	1 year to 3 years after menarche	>3 years after menarche
n	61	97	56	57
Age (years)	12.0 (1.0)	13.6 (1.1)	15.5 (1.3)	17.2 (1.1)
Weight (kg)	39.7 (6.3)	48.0 (6.4)	56.2 (6.2)	59.2 (6.9)
Fat-free mass (kg)	29.7 (3.5)	36.1 (4.0)	40.9 (3.6)	42.9 (4.1)
Fat (kg)	10.1 (3.9)	12.0 (3.2)	15.4 (3.5)	16.3 (3.6)
Percentage body fat	24.8 (5.8)	24.6 (4.1)	27.1 (3.9)	27.3 (3.5)
Leptin (ng/mL)	7.1 (5.5)	8.4 (4.6)	12.5 (6.7)	12.2 (6.1)
Insulin (μU/mL)	12.3 (5.6)	14.4 (6.9)	13.3 (7.7)	11.4 (5.2)
FSH (mIU/mL)	2.5 (1.4)	3.9 (1.6)	2.8 (1.0)	2.7 (1.7)
Estradiol (pg/mL)	20.3 (13.3)	36.6 (19.6)	46.5 (34.4)	50.9 (47.5)

Data represent means (standard deviations). If a subject had more than one observation within a maturational stage, only one observation was included in this table. Decisions were as follows: for all categories except >3 years after menarche, the assessment at which the subject’s age relative to menarche was closest to the middle of the maturational stage was chosen, and for the category of >3 years after menarche the latest assessment (when subject was oldest) was chosen to maximize range.