Understanding Pregnancy Weeks
Pregnancy is measured from the first day of your last menstrual period, not from conception. You're technically not pregnant during the first two weeks. Full-term pregnancy is 37-42 weeks (average 40 weeks or 280 days).
Key Pregnancy Milestones
Week 4-5: Positive pregnancy test
Week 6-7: Heartbeat detectable
Week 12: End of first trimester, reduced miscarriage risk
Week 20: Anatomy scan, gender often visible
Week 24: Viability (survival possible if born prematurely)
Week 37: Full term
Weekly Development
Each week brings new development. First trimester focuses on organ formation. Second trimester involves rapid growth and movement. Third trimester is refinement and preparation for birth. Regular prenatal visits monitor progress.
Quick Tips
- BMI alone doesn't reflect overall health
- TDEE varies based on activity level
- Consult a healthcare professional for medical decisions
Frequently Asked Questions
Conception date is often unknown. Last period is more reliably remembered.
Embryonic age (from conception) is 2 weeks less than gestational age (from LMP).
First-time mothers: 18-20 weeks. Subsequent pregnancies: 16-18 weeks.
Second trimester (weeks 13-26) typically has fewest complications and most energy.
Monthly until week 28, then every 2 weeks until week 36, then weekly until delivery.