First Trimester
5 Weeks Pregnant
Your baby is the size of a Apple seed 🍎
🍎
Medically reviewed by
MBBS, MD — Gynecologist & Obstetrician
Last reviewed:
Feb 2026
📏
Size
Apple seed
📐
Length
0.4 cm cm
⚖️
Weight
NaN g
🗓️
Trimester
First
⏱️
Week
5 of 40
🌱 Baby Development at Week 5
The neural tube — which will become the brain and spinal cord — begins forming. The heart also starts developing and will soon begin beating. This is a critical week for folic acid.
Neural tube formsHeart development beginsCritical folic acid week
🤱 Common Symptoms
●Morning sickness begins
●Fatigue
●Breast changes
●Frequent urination
●Heightened smell sensitivity
🥗 Nutrition Tips
- Folic acid is critical this week for neural tube development
- Small meals to manage nausea
- Avoid undercooked foods
🏃♀️ Exercise Tips
- Moderate exercise is safe
- Avoid activities with fall risk
- Prenatal yoga starting now is ideal
🏥 Medical Tests & Appointments
First prenatal appointment scheduledBlood test to confirm pregnancy and check hCG
🔬 Hormone Changes
hCG continues rising rapidly. Progesterone prevents menstruation. Estrogen supports breast development.
Frequently Asked Questions
Common questions answered by our medical team