Which of the following hormones is responsible for inhibiting lactation during pregnancy?: (A) Progesterone, (B) Human placental lactogen, (C) Oxytocin, (D) Prolactin
Answer is A. Lactation is d/t Prolactin so it cannot inhibit lactation Progestrone: Maintain pregnancy & during pregnancy inhibits Lactation. Post delivery its effect is gone so doesn't inhibit Lactation. Oxytocin: has no role in lactation, its function is milk production.