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Hormonal Effects In Newborns

Hormonal Effects In Newborns

Alternate Names

  • normal conditions in a newborn resulting from maternal hormones


Newborns are often born or experience a variety of conditions after birth that may seem abnormal, but which, in reality, are of no harmful consequence but exist because the mother's hormones passed to the child just before birth or during breastfeeding.

What is going on in the body?

During pregnancy, hormones from the mother's bloodstream enter the body of the unborn child through the placenta. These hormones cause certain conditions that are apparent at birth. In addition, breastfed infants receive maternal hormones in breast milk that may also cause certain conditions that are normal and pose no risk to the baby.


What are the causes and risks of the condition?

This condition is caused by the normal concentration of female hormones in the mother's body during late pregnancy and hormones passed through breastfeeding.


How is the condition diagnosed?

These hormonal effects are often observed during the newborn physical exam or in one of the baby's first of several doctor's visits. Diagnosis is made by looking at the infant. No laboratory tests are indicated. Sometimes a healthcare professional may recommend a blood test to evaluate the bilirubin level if a baby has significant jaundice.

Long Term Effects

What are the long-term effects of the condition?

There are usually no long-term effects to the effects of the maternal hormones.


What are the treatments for the condition?

No treatment is needed. These changes are normal and resolve by themselves within a few weeks.

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