Level 1: Fetal development at 23 weeks of pregnancy. At 23 weeks of pregnancy, the fetus has grown into the size of a small watermelon, about 28 centimeters long and weighing about 500 grams. At this time, the fetus\’s facial features have basically formed, and the hair, eyebrows, and eyelashes have also begun to grow. The fetus\’s lungs and digestion are also maturing. At this time, the pregnant mother