Question
A newborn was born a month after the due date, with a larger body size but poor constitution, and was diagnosed as a postmature infant. What are the characteristics of postmature infants?
Answer
The features of postmature infants are not yet fully clear, but it is generally believed that they are related to the decline in placental function. As the placenta ages, calcifies, and has more obstructive areas, its weight decreases, the spaces between the villi narrow, and the villous vascular walls thicken and close, leading to a decrease in placental function. Additionally, as the fetus grows, it compresses the uterus, slows down uterine blood flow, reduces uterine blood supply, causing progressive hypoxia, which has a severe impact on neonatal health. It is recommended to seek diagnosis and treatment from professional medical institutions.