Gynaecology & Obstetrics Abnormal labor 56939e27 Post-term labour is seen in: A Hydramnios B PID C Anencephaly D Multiple pregnancy High-Yield Explanation Post term labour is seen in anencephaly. Pituitary is absent. It interfers with hormonal control of onset of labour. TEXTBOOK OF OBSTETRICS, SHEILA BALAKRISHNAN, 2nd EDITION,pg:218