The fetus reaches viability (can survive with medical help if born). Lungs are still maturing. Rest if you feel tired.
Period calculator
Week 13 - Rapid Growth Phase
Pre-Pregnancy Checklist
Week 23 - Skin Thins
Revolutionizing Menstrual Health Management
Week 17 - Fat Layers Develop
Week 38 - Organ Maturation
Week 37 - Full-Term Begins