Small-for-gestational-age pregnancies are at cumulative increased risk of stillbirth for each week pregnancy continues beyond 37 weeks.

Context SGA (usually defined as birth-weight <10th centile) affects approximately 10% of pregnancies. Approximately 40% of non-anomalous stillborn infants are SGA, comprising a major contribution to the global public health problem of stillbirth. Optimising outcomes for SGA infants diagnosed before birth is affected by the competing risks of prematurity and, if pregnancy continues, late stillbirth. The aim of this study was to investigate weekly and cumulative stillbirth risk, beyond 37 weeks, in SGA pregnancies. This study included 3333 SGA and 47 053 non-SGA pregnancies from a Washington University perinatal database.