During pregnancy week 15 specifically your baby is working hard to grow blood vessels. During pregnancy week 15 and beyond a fine substance called lanugo begins to cover your baby’s body, except for her palms, soles of her feet, lips, genitals and nails. Most babies will have lanugo until roughly the eighth month of pregnancy when this fine substance starts to shed. Some babies however will have a little lanugo even at birth.
This fine hair helps protect your baby’s body. Did you know some baby’s start sucking their thumb as early as 15 weeks pregnant? It’s true! Your baby’s bones are also becoming harder during pregnancy week 15. By this time your baby is filling his days practicing inhaling and exhaling. While your baby’s lungs are far from developed, this practice is very important for their birth day!

Does the baby stay in the down position until born?
15 weeks and only 175 days- boy time goes by fast!
I think the baby flips all around until he starts running out of space when he naturally heads down and out!