Your baby says
This week, they say, people start calling me by a different word. I'm still the same, though.
What may be happening this week
Around these weeks, the embryonic period comes to an end and, in medical language, the fetal period begins. The basic organ structures have formed in outline; maturing continues for a long time.
A note for you
For the mother, this may be a week that still carries the tiredness of the first trimester. For the father or partner, marking this week with a small 'new stage' note is a quiet way to stand beside her.
A new word, the same small someone. Let's note it and move on this week.
Sizes are averages and every baby grows at their own pace. This page is general information, not medical advice.