Obstetric
Vascular: severe pre-eclampsia, abnormal uterine/umbilical artery Dopplers, APH at term
Infection: chorioamnionitis
Developmental: uteroplacental insufficiency,
IUGR, olgio/anhydraminos, foetal intrauterine death
Idiopathic: non-reassuring CTG, PROM,
prolonged pregnancy
Haematological: Rh disease