Outcome measures
Data on pregnancy outcome were obtained from the maternity hospital
records or the general practitioners of women. Stillbirths were divided
into those that occurred prenatally and those that occurred during
labour (intrapartum stillbirths). Antepartum stillbirths were divided
into those that were associated with placental dysfunction (preeclampsia
or birthweight <10th percentile) and those
due to other causes. Antepartum stillbirths were further divided based
on gestational age at stillbirth into those that occurred at any
gestational age, at <37 weeks and at <32 weeks.