The head is growing fast — brain cells by the million.
About the size of a blueberry — or a small beetle, or a jelly bean. 1 cm (0.4 in), 1.5 g (under 0.1 oz).
What's happening this week. The brain is growing quicker than anything else, arm and leg buds are lengthening into paddles, and nostrils appear on the tiny face.
Brain cells forming rapidly. Arms and legs lengthen. Nostrils appear.
The baby doubles in size this week — and does it again the week after.
What your partner can do this week: Ask what would actually help this week rather than guessing — then do it without a reminder. Start a list of money questions: leave, childcare, what the first year might cost. Read up on how appointments usually run, so you both know what's coming.