Vaginal Bleeding in Infants Underlying Cause
Vaginal bleeding in infants during the first week of life is due to estrogen, which was passed from the mother to the fetus during pregnancy. The estrogen hormone stimulates the uterus, causing a tiny menstrual period. This is a normal response in a female infant.
Additional causes of vaginal bleeding in infants include:
- Merritt DF. Evaluation of vaginal bleeding in the preadolescent child. Semin Pediatr Surg. 1998 Feb;7(1):35-42.