First Trimester
Week 5
Reviewed by Dr. Humaira Latif, OB-GYN & Ultrasound Specialist
Welcome to week 5 of your pregnancy. Here’s a gentle look at what to expect at 5 weeks pregnant — baby’s size, changes in your body, common 5 weeks pregnant symptoms and a caring tip from Dr. Humaira.
Baby's size
About the size of a sesame seed — 2mm.
What's happening
Baby's heart is beginning to form and will start beating this week. The neural tube (future brain and spinal cord) is developing.
Your body
Rising hormones may bring early pregnancy symptoms in full force.
Common symptoms
- Fatigue
- Nausea
- Frequent urination
- Sore breasts
- Mood changes
When to call your doctor
- Heavy bleeding
- Severe cramping
- Shoulder-tip pain (ectopic warning)
Dr. Humaira's tip
Continue folic acid daily. Small, frequent snacks and staying hydrated help early nausea more than large meals.
Educational only — not a substitute for in-person medical advice. Always follow your own doctor's guidance.