8 weeks-your baby's arms and legs are growing longer, and fingers have begun to form. The shell-shaped parts of your baby's ears also are forming, and your baby's eyes and nipples are visible. The upper lip and nose have formed. The trunk of your baby's body is beginning to straighten.Your baby may begin to move this week, but you won't be able to feel it yet. By the end of this week, your baby may be about 1/2 inch long.
9 weeks-your baby's arms grow, develop bones and bend at the elbows. Toes begin to form, and your baby's eyelids and ears continue developing. By the end of this week, your baby may be close to 3/4 inch long.
10 weeks-your baby's head has become more round. The neck begins to develop, and your baby's eyelids begin to close to protect his or her developing eyes.Although the genitals are developing, it's still too soon to identify your baby's sex.
11 weeks-your baby's head still makes up about half of its length. But your baby's body is about to catch up, growing rapidly in the coming weeks. Your baby is now officially described as a fetus. This week your baby's eyes are widely separated, the eyelids fused and the ears low set. Red blood cells are beginning to form in your baby's liver. By the end of this week, your baby's external genitalia will start developing into a penis or clitoris and labia majora. By now your baby may measure about 2 inches long.
12 weeks-Your baby's face now has a human profile. By now your baby may be nearly 2 1/2 inches long.
13 weeks-Your baby's eyes are starting to move closer together by pregnancy 13 weeks. Up until this point in time, they rested closely along the sides of the head. Your baby's intestines are also moving further into the body, and your baby's tiny pancreas is starting to produce insulin.
14 weeks-your baby's body is growing quite rapidly. His length is catching up with his slightly larger head. The ears have started their move to the sides of the head, and the eyes continue to get closer and closer together.
15 weeks-Your baby's legs are growing longer than his arms now and all his joints and limbs can move. His genitals may be developed enough to show on an ultrasound scan.
16 weeks-Your baby is about the size of a pear this week. Some of the more advanced body systems are working now, including his circulation and urinary tract. Your baby may be playing with the umbilical cord too.
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