Post-term labour is seen in:: (A) Hydramnios, (B) PID, (C) Anencephaly, (D) Multiple pregnancy
Answer is C. 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