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Week by week

Week 4: about the size of a poppy seed

The Week of Holding On — Week 4

0.1 cmTrimester 1
Your baby says

This week I'm trying to settle in somewhere. The address is new, and so am I.

What may be happening this week

Around this time, the developing cluster of cells may settle into the wall of the uterus; some pregnancy tests may start showing a result toward the end of this week. The timing isn't the same for everyone.

A note for you

For the mother, this week may be a test, a wait, or just a feeling. For the father or partner, the moment of hearing the news can be a small beginning of their own.

A new address, a new week. Let's leave it at that for now.

Sizes are averages and every baby grows at their own pace. This page is general information, not medical advice.