How many placentas do dizygotic twins have?

Dizygotic twins, also known as fraternal twins, result from the fertilization of two separate eggs by two separate sperm cells. Each egg develops independently, leading to the formation of two distinct placentas. Because they come from different zygotes, each twin has its own amniotic sac and placenta, creating a unique environment for each fetus. This is a key characteristic of dizygotic twinning compared to monozygotic twins, who share a placenta because they originate from a single fertilized egg that splits into two embryos. The presence of two placentas in dizygotic twins is important for their individual nutritional needs and waste removal throughout the pregnancy.