3 Weeks Pregnant

It's happened! You conceived! Not sure what to expect at 3 weeks pregnant? Get answers to your questions about early pregnancy symptoms, fetal development, implantation pain, and using our due date calculator!

by BabyZone's Pregnancy Week-by-Week Contributors

All About Baby

fetal development at 3 weeks illustration

Twenty-four hours after conception, your baby-to-be exists as a cluster of rapidly growing cells. At this early stage, the clustered cells begin traveling from the point of fertilization in the fallopian tube to the final home in the uterus. At this point, your developing baby relies on nutrients stored within the egg cell to survive; it will still be a few days before it's implanted in the uterus and the placenta begins to form.

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