Publications by authors named "Marlies E W A Van Altvorst"
Background: Antepartum haemorrhage of unknown origin (APHUO) is associated with preterm birth and perinatal mortality.
Aim: To determine whether smoking beyond the first trimester of pregnancy was an independent risk factor for APHUO.
Methods: Rates of APHUO were compared between non-smokers and smokers, and non-smokers and ceased smokers.