Pregnancy Week by Week Guide

Detailed pregnancy week guide tracking your baby's development from conception to birth

Select Week

Important Milestones

First Trimester Milestones

  • Week 4: Implantation occurs
  • Week 8: Embryo becomes fetus
  • Week 12: End of first trimester

Second Trimester Milestones

  • Week 16: Gender may be determined
  • Week 20: Halfway point
  • Week 24: Viability milestone

Third Trimester Milestones

  • Week 28: Third trimester begins
  • Week 32: Bones harden, brain develops rapidly
  • Week 36: Considered late preterm if born
  • Week 37: Full-term pregnancy begins

Important Note

This information is for educational purposes only and should not replace professional medical advice. Always consult with your healthcare provider for personalized guidance.