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Brain Surface Convolutions Begin. |
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Fetal size: weight almost 2.4 pounds (1.1kg). Crown-to-rump length is close to 10 inches (25cm). Total length is 15.75 inches (35cm). Head and Neck Fetal brain's surface appears wrinkled. These convolutions provide more surface area and maximize brain cells. Rhythmic beathing and body temperature are now controlled by the brain. Lanugo hair has disappeared almost completely, except on back and shoulders. Head hair is present. Limbs Production of red blood cells is entirely tasken over by the bone marrow. Abdomen Fetal body is two to three percent body fat. Skin Skin begins to smoothen as fat deposits accumulate underneath. The fat insulates and is an energy source. |
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