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
smaller than a grain of rice
0.1 inches · less than 1 gram
Baby this week
- •Blastocyst implanting into the uterine wall
- •Cell differentiation beginning to form the embryo and support structures
- •Amniotic sac and yolk sac starting to develop
You this week
- •Possible light spotting from implantation
- •Mild cramping similar to period cramps
- •Breast tenderness beginning
- •Fatigue from hormonal changes
- •Frequent urination may start
This week's tips
- •Take a prenatal vitamin with folic acid daily if you haven't already—this is crucial for baby's neural development
- •Stay hydrated and get extra rest as your body works hard behind the scenes
- •Avoid alcohol, smoking, and unnecessary medications
- •Track your cycle if you haven't confirmed pregnancy yet; a missed period is typically the first sign
- •Be gentle with yourself emotionally—hormones are shifting rapidly
Informational only — always check with your doctor or midwife for advice specific to you and your baby.
Looking ahead
By next week, you may be able to detect pregnancy with a home test as hCG levels rise. Your first appointment with a healthcare provider will likely happen within the next few weeks.
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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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