19 Weeks

How your baby's growing:Your baby weighs about 8 1/2 ounces, and he measures 6 inches, head to bottom — about the length of a small zucchini. His arms and legs are in the right proportions to each other and the rest of his body now. His kidneys continue to make urine, and the hair on his scalp is sprouting. This is a crucial time for sensory development: Your baby's brain is designating specialized areas for smell, taste, hearing, vision, and touch. If your baby is a girl, she has an astonishing 6 million eggs in her ovaries. They'll dwindle to fewer than two million by the time she's born.

Your baby has the same awake and sleep patterns of a newborn. He has a favorite position for sleep and recognizable active and rest periods.
Throughout baby's body, nerves are being coated with a fatty substance called myelin, which insulates the nerves so that impulses can flow smoothly.
Scalp hair becomes apparent this week. It has sprouted and continues to grow.
The milk teeth buds have already developed and over the next few days the buds for the permanent teeth will begin to form behind the milk teeth.
If baby is female the uterus starts to develop. If you're having a girl, the vagina, uterus, and fallopian tubes are in place.
If it's a boy, the genitals are distinct and recognizable.
Your baby is swallowing amniotic fluid and his or her kidneys are making urine.
Your little one's size is around 6.02 inches (15.3cm) and 8.47 ounces (240gm).