Week 5 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 sesame seed
0.125 inches · less than 1 gram
Baby this week
- •Heart is beginning to beat and circulate blood
- •Neural tube (foundation for brain and spinal cord) is forming
- •Arm and leg buds are starting to develop
- •Amniotic sac is growing and providing cushioning
You this week
- •Missed period (if you haven't already)
- •Breast tenderness and swelling
- •Fatigue and increased need for sleep
- •Nausea or food aversions (morning sickness may be starting)
- •Mood swings from hormonal changes
- •Frequent urination
- •Mild cramping (usually normal)
This week's tips
- •Confirm your pregnancy with a blood test from your doctor for more accurate dating
- •Start taking prenatal vitamins with folic acid if you haven't already—this supports baby's neural development
- •Eat small, frequent meals to help manage nausea; ginger tea or crackers may help
- •Stay hydrated and get extra rest when possible
- •Avoid alcohol, smoking, and raw/undercooked foods
- •Keep a symptom journal if it helps you feel more connected to what's happening
Informational only — always check with your doctor or midwife for advice specific to you and your baby.
Looking ahead
By next week, your baby's heartbeat may be detectable via ultrasound. You'll likely schedule your first prenatal appointment soon, which is an exciting milestone where you'll get more personalized care and guidance.
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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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