Pregnancy
Fetal development
How your baby grows from a single cell to a newborn — and what to do at each stage. Plain-language guides drawing on ACOG, the Mayo Clinic, and the NHS.
2 live · 3 more coming soon
What happens between fertilization and the first missed period — the most important biological setup of the entire pregnancy, packed into roughly 14 days.
A simple daily habit that lets you spot meaningful changes in your baby's movement — and one of the most useful things you can do in the third trimester.
Coming soon
- First trimester fetal development
- Second trimester fetal development
- Third trimester fetal development
Related
Looking for week-specific information instead of an overview? Browse the week-by-week pregnancy guide — each week has its own page with what's happening, common symptoms, and what to do.
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