Figure 4

Gestational age and birth weight distributions and perinatal mortality rates among nulliparous and parous women. Legend text: Gestational age (upper left) and birth weight (upper right) distributions and gestational age-specific perinatal mortality rates, calculated as per conventional (lower left) and using the fetuses-at-risk approach (lower right), among births to nulliparous vs parous women, Canada (excluding Ontario), 1991–97.