1st trimester · Week 10
10 weeks pregnant
Organs in miniature
Vital organs exist in rudimentary form. The embryo swallows tiny amounts of fluid and the kidneys start to make urine. The highest-risk window of organ formation is beginning to close — not ended.
How big is your baby at 10 weeks?
- Length
- 3.1 cm
- Weight
- 4 g
- Size
- Blackberry
On average about 3.1 cm long and 4 g. Size comparison: Blackberry.
These are averages; every baby grows at their own pace.
How is your baby developing at 10 weeks?
Fingers and toes are separating. Eyelids are forming. The gut is rotating back toward the abdomen. Crown–rump length is often near 3 cm. Heart rate on scan is commonly faster than an adult’s (often 150–180).
What changes in your body at 10 weeks?
Your waist may thicken slightly. Hunger can return in waves after days of aversion. Some people notice increased vaginal discharge (usually thin and pale); itching, odor, or pain needs a check.
Tips for this week
Wear breathable underwear and avoid scented washes. Ask about first-trimester screening (blood tests and nuchal translucency, typically 11–13+6 weeks) so you can decide with information, not pressure. Continue prenatal vitamins.
