Pregnancy and Lactation Physiology · Physiology

The hormone primarily responsible for maintenance of pregnancy in early gestation is:

  1. Estrogen, secreted mainly by the placenta
  2. Progesterone
  3. Oxytocin, from the posterior pituitary
  4. Prolactin, from the anterior pituitary
Show answer and explanation

Correct answer: Progesterone

Progesterone maintains the endometrium and suppresses uterine contractions. In early pregnancy it is initially supported by corpus luteum secretion.

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