Overview

Oxytocin is a hormone released from the pituitary gland (Figure 1) in the brain. During pregnancy, this hormone causes labour 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.

Figure 1 - Pituitary gland

The pituitary gland is a small organ located beneath the brain. The pituitary gland produces substances called hormones. These hormones enter the bloodstream and help control many processes of the body.

Current as of: April 30, 2024

Author: Ignite Healthwise, LLC Staff
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