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Oxytocin

Overview

Oxytocin is a hormone released from the pituitary gland in the brain. During pregnancy, this hormone causes labor contractions to start. It also is released when a woman's breasts are stimulated by suckling or pumping, causing milk to move from the ducts and out the tiny holes in the nipple. This is called the let-down reflex. In the first few days after delivery, oxytocin also causes uterine contractions. They help shrink the uterus back to the size it was before pregnancy.

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    Current as of: October 2, 2023

    Author: Healthwise Staff
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