3 Weeks Pregnant Baby Development, Symptoms & What to Do Now

At 3 weeks pregnant, big changes are happening — even if you don’t feel them yet.

In this episode of the What to Expect Podcast, we explore what’s going on during Week 3 of pregnancy, including how implantation begins, what early symptoms might appear, and what steps to take to support a healthy pregnancy. With guidance from trusted BabyCenter resources, this episode gives you clear, medically-reviewed information during these early (and often confusing!) weeks.

🎯 In This Episode:

- What’s happening inside your body at 3 weeks pregnant
- Early pregnancy symptoms you might (or might not) notice
- How the fertilized egg implants and starts developing
- A helpful checklist for Week 3: nutrition, rest, and what to avoid
- BabyCenter’s expert tools for tracking your pregnancy
- What to do if you’re not sure whether you're pregnant yet
- This early stage is foundational — and we’re here to walk you through it.

📌 Subscribe to the What to Expect Podcast for week-by-week updates, pregnancy tips, and expert advice for every stage.