toggle mobile menu Menu
toggle search menu

Site Navigation

Supplemental

Menu

Topic Overview

Oxytocin is a hormone released from the pituitary gland in the brain. During pregnancy, oxytocin causes labor contractions to begin. Oxytocin 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 (let-down reflex). In the first few days after delivery, oxytocin also causes uterine contractions that help shrink the uterus back to its prepregnancy size.

After breastfeeding is established, your body may release oxytocin when you hear a baby cry, think of your baby, or have sexual intercourse. When this occurs, your breasts may leak milk whether or not you are actively breastfeeding or pumping.

Your body may not release oxytocin when you are anxious, embarrassed, or distracted. You may need to breastfeed in a relaxing, quiet, familiar, private place for let-down to occur.

Related Information

Credits

Current as ofMay 29, 2019

Author: Healthwise Staff
Medical Review: Sarah A. Marshall, MD - Family Medicine
Adam Husney, MD - Family Medicine
Kathleen Romito, MD - Family Medicine
Kirtly Jones, MD - Obstetrics and Gynecology, Reproductive Endocrinology

This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Healthwise is a URAC accredited health web site content provider. Privacy Policy. How this information was developed to help you make better health decisions.

© 1995-2015 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.