Week 15: I'm your tiny dancer

Fetal development in pregnancy week 15

~length
4 in | 10 cm

~weight
2.5 oz | 70 g

Your adorable four-inch break-dancer is busy cutting a rug inside their dance studio, even if you still can't feel it.
The majority of women don't feel those first magical movements (and not just the not-so-magical gas from the chili at dinner last night) until the 18th week or later.
Interesting fetal developments: your wee monkey's elbows and knees are bending more freely this week and their little legs are finally less stubby than their arms.
Many of your baby's major organ systems are increasing in capacity - especially their amazing tiny heart and circulatory system, which is now pumping about 25 quarts of blood per day, and will increase to a very impressive 200 quarts per day by the end of the pregnancy.
You wee womb-tenant is now capable of making all sorts of interesting facial expressions, which include squinting, frowning, and grimacing (at the taste of their pee?).
As far as hair goes, we've got some new scalp patterns beginning to develop on the head, although actual head hair is not yet present, just their furry monkey lanugo.