Fetal development at 37 weeks of pregnancy: The fetus at 37 weeks of pregnancy has completed the development of its main organs and systems. Its body weight is about 2300-2700 grams and its body length is about 48 cm. The fetus at this time is healthy enough to survive birth. The fetal head circumference has adapted to vaginal delivery, the fetal hair has grown about 2.5-3 cm, the skin color has become more pink, and the lungs have matured and produced surfactant to help breathing. In addition, the length of the fetus\’s umbilical cord is about 50 cm, and the umbilical cord has become thick and sticky.