During childbirth, a hormone produced by the pituitary gland causes muscles of the mother's uterus (or womb) to contract. the more contractions there are, the more hormone is produced. which best explains why this occurs? positive feedback is used to build more contractions. positive feedback is used to lessen the effects of the contractions. negative feedback is used to build more contractions. negative feedback is used to lessen the effects of the contractions.

Positive feedback is used to build more contractions

Explanation:

Positive feedback is a mechanism in which the final effect of an action causes more of that action to occur. Positive feedback usually occurs in biological systems. In the question, positive feedback is the mechanism that controls the production of the hormone. The production of the hormone causes an action (i.e. the contraction of the muscles of the mother's uterus) which also triggers more of its own release. This means that the more contractions that occur, the more hormone is released.

A.

Explanation:

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