Vaginal bleeding in a newborn is most commonly due to which cause?

Vaginal bleeding in a newborn is most commonly due to which cause?

• A. It indicates an underlying pathology
• B. The sudden drop in maternal estrogen after birth
• C. Premature maturation of the reproductive tract
• D. Excess estrogen exposure from mother

Answer: (B)

Vaginal bleeding in a newborn is a normal physiologic finding caused by the sudden withdrawal of maternal estrogens after birth. During pregnancy, maternal estrogen crosses the placenta and stimulates the fetal reproductive tract, which can lead to some vaginal shedding or bleeding once the infant is born and estrogen levels drop. This bleeding is typically seen in the first few days of life and is self-limited, usually resolving within a week or two. It isn’t a sign of underlying pathology, and it isn’t due to premature maturation of the reproductive tract or ongoing maternal estrogen exposure after birth.

Vaginal bleeding in a newborn is a normal physiologic finding caused by the sudden withdrawal of maternal estrogens after birth. During pregnancy, maternal estrogen crosses the placenta and stimulates the fetal reproductive tract, which can lead to some vaginal shedding or bleeding once the infant is born and estrogen levels drop. This bleeding is typically seen in the first few days of life and is self-limited, usually resolving within a week or two. It isn’t a sign of underlying pathology, and it isn’t due to premature maturation of the reproductive tract or ongoing maternal estrogen exposure after birth.