First Trimester • Week 4 of 40

Week 4 of Pregnancy

Your baby is about the size of a poppy seed (1-2 mm)

4
Weeks Pregnant
252
Days Until Due Date
1
1st Trimester

👶Your Baby This Week

Baby Size: Poppy seed (1-2 mm)
Approximate size comparison for week 4
1

Your baby is now an embryo, about the size of a poppy seed

2

The neural tube (future brain and spinal cord) begins forming

3

Basic cell layers that will form major organs are developing

4

The beginnings of the heart, lungs, and digestive system start forming

🤰Your Body This Week

You may notice a missed period - often the first sign of pregnancy

Implantation bleeding might occur (light spotting)

Early pregnancy hormones (hCG) begin rising

You might feel more tired than usual

Mild cramping may occur as the embryo implants

This Week's To-Do List

Take a home pregnancy test if youve missed your period

Continue taking folic acid supplements

Schedule an appointment with your healthcare provider

Start avoiding alcohol, raw meats, and unpasteurized foods

Begin documenting your last menstrual period date

When to Call Your Doctor

Contact your healthcare provider immediately if you experience any of these symptoms:

!

Call your doctor for severe abdominal pain or heavy bleeding

!

Report persistent nausea that prevents eating or drinking

!

Contact your provider if you have concerns about early pregnancy symptoms

Medical Disclaimer

The information provided for week 4 of pregnancy is for educational purposes only and should not replace professional medical advice. Every pregnancy is unique, and individual experiences may vary. Always consult with your healthcare provider for personalized medical guidance and to address any concerns about your pregnancy.