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Why does my baby have breasts?

4 doctor answers4 doctors weighed in
Dr. Ruben Rucoba
Pediatrics 33 years experience
Hormones: Prolactin is a hormone your body produces so you will get breast milk. The prolactin is transferred to the baby while in your womb, and then through your breast milk. The hormone causes changes in your baby similar to the changes to your body: swelling of breast tissue, breast tenderness, and even a little milk production. Even boys exhibit these changes. Rest assured, it's all normal.
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Dr. Robert Kwok
Pediatrics 34 years experience
Pregnancy hormones: Babies are exposed to mom's hormones during pregnancy. Some babies develop "baby breasts", which are lumps under the nipples. If one or both lumps are reddened, or tender to the touch, a doctor should examine them. Squeezing the lumps or playing with them will usually make them worse. They can be left alone, and will go away because after birth, babies are no longer getting mom's hormones.
Created for people with ongoing healthcare needs but benefits everyone.
Dr. Kevin Windisch
Pediatrics 26 years experience
Mom's estrogen: Your baby boy or girl got mom's estrogen across the placenta. This resulted in breast budding. Now that the placenta is no longer attached they will shrink down over the next few months. This is common.
Created for people with ongoing healthcare needs but benefits everyone.
Dr. Paul Trani
Specializes in Pediatrics
Hormones!: The levels of circulating hormones in your baby's body after birth are really high! additionally, they might be getting an extra boost of hormones from breast-feeding as well. Never fear; those hormone levels will fall within the first few months of your baby's life, and the breast tissue will subside.
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Oct 15, 2013

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