Table I.

Parameter Estimates Obtained by Fitting Eq. 2 to Birth Weight-GA Data Extracted from Arbuckle et al. (13)

	Male, singleton	Female, singleton	Male, twin	Female, twin
A (g·day−4)	−1.21 × 10−5	−1.60 × 10−5	−9.09 × 10−6	−1.28 × 10−5
B (g·day−3)	9.37 × 10−3	1.28 × 10−2	6.72 × 10−3	1.01 × 10−2
C (g·day−2)	−2.53	−3.66	−1.73	−2.87
D (g·day−1)	3.0 × 102	4.61 × 102	1.98 × 102	3.67 × 102
E (g)	−1.30 × 104	−2.15 × 104	−8.40 × 103	−1.78 × 104
M (g)	46.83	30.70	25.65	13.61
γ (day−1)	1.65 × 10−2	1.86 × 10−2	1.97 × 10−2	2.27 × 10−2