Table 2 Pregnancy and birth outcomes (n = 78,318)

Study sample^a

Median (IQR)

90% range

Time to pregnancy (months)^b

56,416

1.5 (0.5, 6)

0.5–14

Gestational length (weeks)

77,995

40 (39, 41)

37–42

Birth weight (g)

78,210

3610 (3275, 3945)

2704–4460

Birth weight (z-score by gestational age and sex)

77,949

0.08 (− 0.54, 0.73)

− 1.42–1.77

Placenta weight (g)

76,343

660 (580, 760)

450–940

Head circumference (cm)

76,693

35 (34, 36)

33–38

Study sample^a

Number with outcome

Percent with outcome

Subfecundity (> 12 months) ^b

56,416

6078

10.8 (10.0^c)

Intrauterine death

78,318

270

0.34 (0^c)

Preeclampsia

78,318

2936

3.8 (2.7^c)

Preterm delivery (< GW 37)

77,995

3889

5.0 (2.9^c)

Spontaneous preterm delivery (< 37 weeks)

77,940

2211

2.8 (2.2^c)

Early preterm delivery (< 32 weeks)

77,995

612

0.78 (0.04^c)

Small for gestational age (< 10 percentile)

77,949

7637

9.8 (8.2^c)

Large for gestational age (> 90 percentile)

77,949

7539

9.7 (10.6^c)