First Trimester
4 Weeks Pregnant
Discover what happens at 4 weeks pregnant. Learn about early pregnancy symptoms, baby development, and important first steps for a healthy pregnancy.
👶 Your Baby This Week
🌱
Size of a poppy seed
0.04" (0.1 cm)
Development Highlights
- ✓Embryo implants in the uterine wall
- ✓Amniotic sac and placenta begin forming
- ✓Neural tube (future brain and spinal cord) starts developing
- ✓Heart tube begins to form
🤰 Common Symptoms This Week
- •Missed period
- •Light spotting (implantation bleeding)
- •Breast tenderness
- •Fatigue
- •Mild cramping
💡 Tips for Week 4
- 1Take a home pregnancy test
- 2Start taking prenatal vitamins with folic acid
- 3Schedule your first prenatal appointment
- 4Avoid alcohol, smoking, and harmful substances
🔍 Ultrasound at Week 4
What can be seen:
- 👁Gestational sac may be visible