Patient's question:
NoDoctor's answer:
This is a physiological phenomenon in newborns, known as "pseudomenstruation." The reason for this phenomenon is that the mother transmits estrogen to the fetus during the late stages of pregnancy. This endocrine hormone stimulates the proliferation and congestion of the female infant's reproductive tract mucosa. After birth, since the source of estrogen obtained from the mother is interrupted, the estrogen concentration in the female infant's body also drops sharply. Within 3-5 days, it decreases to a very low level. The supporting effect of estrogen on the proliferation and congestion of the reproductive mucosa is also interrupted. As a result, the previously proliferated and congested endometrium is shed, leading to the discharge of a small amount of blood and some bloody secretions from the vagina in the female infant, which exhibits a similar appearance to "menstruation." Therefore, it is referred to as "pseudomenstruation."