Table 2.

The geometric mean maternal serum leptin concentration measured across gestation^*.

Visit Number	Gestational Age	Leptin Concentration (ng/mL)
		Normal Weight	Overweight/Obese
		Geometric Mean (95% CI)	Geometric Mean (95% CI)
0	6–10 weeks	13.5 (12.2, 14.9)	30.0 (27.1, 33.1)
1	10–14 weeks	14.9 (13.5, 16.4)	33.1 (30.0, 33.1)
2	16–20 weeks	16.4 (14.9, 18.2)	33.1 (30.0, 36.6)
3	22–26 weeks	20.1 (18.2, 22.2)	36.6 (33.1, 40.4)
4	32–36 weeks	20.1 (18.2, 22.2)	33.1 (30.0, 36.6)

^*At each visit, the logarithm of the leptin concentration is statistically significantly different by obesity status (t-test; p<0.0001). Log transformed values were used for testing differences, but estimates provided in the table were back-transformed.