Week 3 of Pregnancy
First trimester
For informational purposes only. This page is not medical advice. Every pregnancy is different — always consult your doctor, midwife, or healthcare provider for guidance specific to your situation. In an emergency, call your provider or 911 immediately.
Baby is
about the size of a poppy seed
0.05 inches · less than 1 gram
Baby this week
- •Blastocyst has implanted into the uterine wall
- •Cells are rapidly dividing and organizing into layers
- •The amniotic sac is beginning to form
You this week
- •You may not feel anything yet—that's completely normal
- •Possible light spotting from implantation
- •Tender breasts or breast sensitivity
- •Mild fatigue
- •Slight nausea (if experiencing early pregnancy symptoms)
This week's tips
- •Start taking prenatal vitamins with folic acid if you haven't already—this supports baby's neural development
- •Stay hydrated and eat regular, balanced meals to support your changing body
- •Avoid alcohol, smoking, and recreational drugs
- •Keep a symptom tracker or journal to share with your healthcare provider at your first appointment
Informational only — always check with your doctor or midwife for advice specific to you and your baby.
Looking ahead
Next week, you may miss your period—a clear sign it's time to take a pregnancy test. The very early weeks are precious; many people choose to wait until after a missed period to share their news.
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For informational purposes only. This page is not medical advice. Every pregnancy is different — always consult your doctor, midwife, or healthcare provider for guidance specific to your situation. In an emergency, call your provider or 911 immediately.
This content is for informational purposes only and is not medical advice. Every pregnancy and baby is different. Always consult your doctor, midwife, or pediatrician for guidance specific to your situation.
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