A creamy coat forms to protect the skin.
About the size of a mango — or a squirrel, or an éclair. 15.3 cm (6 in), 240 g (8 oz).
What's happening this week. Vernix — a creamy white coating — begins covering the skin to protect it from the amniotic fluid. The senses are staking out their own areas of the brain.
Vernix begins to form. Senses mapping in the brain. Kidneys making urine.
The baby's brain is designating specialised areas for smell, taste, hearing, sight and touch this week.
What your partner can do this week: Start talking about what you both want for the birth. Nothing needs deciding yet. Agree a budget for the big buys and put it where you can both see it. Take a bump photo each week, if your partner would like that.