All measurements are approximate. Click here to see how we calculate baby's length and weight. Sizes vary significantly for multiples.
Baby:
Your baby is now about the size of a date. This week the embryo sends the first measurable brainwaves and starts moving, though they’re not intentional movements and you won’t be able to actually feel them for a while.
The facial structure, eyes, ears, nose and mouth keep developing and becoming more distinct. Inside the ear, the cochlea and semicircular canals are forming; these are important not only for hearing but also for balance. Up till now the eyes and ears have been in strange spots: the eyes on the side of the head and the ears closer to the mouth. This week they start moving to where they’ll eventually land.
Baby is growing longer, and muscle and cartilage are hardening. The head, which had been leaning forward, is now raised, so the neck and throat are stretched out. The stomach now appears in the left part of the abdomen. The heart is beating faster than ever — an average of 177 beats per minute!
What were arm buds are now shoulders, elbows, forearms and palms. The legs develop slower, but toward the end of this week they will be thighs, knees, ankles and foot soles.
If you happen to be carrying multiples, they'll look something like the image above.