This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Physiological Changes of Pregnancy, Subject name: Gynaecology & Obstetrics
Hypothyroidism in pregnancy is least likely associated with: 
Select and explain. 
A. Recurrent aboions, B. Polyhydramnios, C. Pregnancy induced hypeension (PIH), D. Prematurity
B: Polyhydramnios
Answer: B: Polyhydramnios 
Explanation: Hypothyroidism is associated with early aboions, preterm labor, still bih. The baby of a severe hypothyroidism may be born a cretinism which is a severe form of brain dysfunction associated with deaf mutism, spastic motor disorder and hypothyroidism. The association with PIH results in an early delivery and hence a low bih weight. There is high association with PIH and is not known to give rise to polyhydramnios.