14 weeks, 2 days

Crown to rump, Boo is around 9 centimetres long and weighs 43 grams. The body is now growing faster than the head. This week, the parchment-thin skin covers itself with lanugo (ultra-fine, downy hair that usually disappears before birth). Though eyebrows are beginning to grow and the hair on top of the head is sprouting, this hair may change in both texture and colour after birth. About now, Boo can grasp, squint, frown, and grimace. He/she may even be able to suck his/her thumb. Researchers believe these and other movements probably correspond to the development of impulses in the brain.