Fat stores are beginning to build.
About the size of a pomegranate — or a baby rabbit, or a cinnamon roll. 13 cm (5.1 in), 140 g (5 oz).
What's happening this week. The first body fat is being laid down under the skin, the skeleton is turning from soft cartilage to bone, and the umbilical cord grows thicker and stronger.
Body fat starts building. Cartilage turning to bone. The cord grows stronger.
The baby's heart is now regulated by the brain rather than beating on its own.
What your partner can do this week: Start clearing the space the baby will sleep in. Add names you like as they occur to you; the ones you're unsure about can wait. Plan a slow weekend together, if you'd both like one.