First Trimester · Week 3 of 40
3 Weeks Pregnant
🌱
Size of a poppy seed
0.2 cm
Length
1
Trimester
Milestone: Neural tube begins forming
Week 1Week 3 (8%)Week 40
Medical Information
The information on this page is for educational and informational purposes only. It is not medical advice and should not be used to diagnose or treat any medical condition. Always consult your healthcare provider (doctor, midwife, or nurse) before making any decisions about your pregnancy or your baby's health.
Baby Development at 3 Weeks
- The neural tube (brain and spinal cord) starts developing
- The heart begins to form
- Three layers of cells differentiate (ectoderm, mesoderm, endoderm)
Symptoms at 3 Weeks Pregnant
- Missed period
- Nausea (morning sickness) may begin
- Fatigue and breast tenderness
Tips for Week 3
- 1.Take a home pregnancy test if your period is late
- 2.Call your OB to schedule your first prenatal visit
- 3.Avoid NSAIDs like ibuprofen — use acetaminophen instead
Week 3 Checklist
- Take a pregnancy test
- Call OB for first prenatal appointment