1. Characteristics of a male fetus eight months pregnant A male fetus eight months pregnant is already very mature, with a length of about 45 centimeters and a weight of about 2.2 kilograms. At this time, the shape of the male fetus is clearly visible, and hair and eyebrows have begun to grow. The testicles of a male fetus have begun to descend into the scrotum and begin to secrete testosterone, one of the male hormones. In addition, the lungs of a male fetus are mature enough to function on their own