Your baby weighs about 4.9 ounces (140 grams) and is about 5.1 inches (13 cm) from crown to rump. The placenta, which nourishes the fetus with nutrients and oxygen and removes wastes, is growing to accommodate your baby. It now contains thousands of blood vessels that bring nutrients and oxygen from your body to the baby, fueling his growth.
Your little one starts to form fat this week. The fat resides under the skin and is important in generating heat and maintaining a steady metabolism. At birth, 2-6 percent of the baby’s weight will be fat. This will help maintain a steady body temperature. The baby’s movements are becoming stronger and more frequent. Loud noises outside the uterus may also startle the baby.
