First trimester
Week 10 of Pregnancy
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About the size of a prune
1.2 in · 3.1 cm · 0.1 oz · 4 g (crown to rump)
Your baby this week
- Officially a fetus now — vital organs are formed and beginning to function.
- Fingernails and downy hair follicles start developing.
- The placenta takes over hormone production from the ovaries.
What you may be feeling
- Nausea may begin easing
- Visible veins from increased blood volume
- Mild round ligament twinges
Gentle tips for this week
- This week opens the window for optional genetic screening such as NIPT — ask your provider what is right for you.
- Note which symptoms ease; the second trimester often brings relief.
Common question for week 10
What is NIPT and when is it done?
Noninvasive prenatal testing analyzes fetal DNA in the mother's blood, usually from 10 weeks. It screens for chromosomal conditions and can reveal the baby's sex. It is a screening, not a diagnostic test.
Every pregnancy is different. Sizes are averages, symptoms vary widely, and none of this replaces the guidance of your own provider.