Pregnancy Week by Week: Your Complete 40-Week Guide
Follow your pregnancy journey from conception to birth with our comprehensive week-by-week guide. Track your baby's development, understand your symptoms, and prepare for each milestone.
Understanding Your Pregnancy Journey
Pregnancy is typically measured as 40 weeks, starting from the first day of your last menstrual period (LMP). This is the standard dating method used by healthcare providers, even though conception usually occurs around week 2. Your pregnancy is divided into three trimesters, each with unique developmental milestones and experiences.
🌱 First Trimester (Weeks 1-13)
Rapid development occurs as all major organs form. You may experience morning sickness, fatigue, and breast tenderness. The first trimester includes important prenatal screenings and your first ultrasound.
Learn more about first trimester🌿 Second Trimester (Weeks 14-27)
Often called the "honeymoon phase" as many early symptoms ease. You'll feel baby's first movements and have the anatomy scan. Energy levels typically improve during this time.
Learn more about second trimester🌳 Third Trimester (Weeks 28-40)
Baby grows rapidly and positions for birth. Prenatal visits become more frequent. This is the time to prepare for labor, set up the nursery, and finalize your birth plan.
Learn more about third trimesterMedical Notice: This week-by-week guide provides general information about typical pregnancy progression. Every pregnancy is unique. The information here should complement, not replace, advice from your healthcare provider. Always consult your OB-GYN or midwife with questions about your specific pregnancy. Read full disclaimer
First Trimester
Weeks 1-13
Second Trimester
Weeks 14-27
Third Trimester
Weeks 28-40
Helpful Pregnancy Resources
Quick Navigation
Jump to a specific trimester for more detailed information
More Pregnancy Resources
📅 Due Date Calculator
Calculate your estimated due date based on your last menstrual period or conception date.
💭 Pregnancy Symptoms Guide
Comprehensive guide to common pregnancy symptoms and when to call your doctor.
🥗 Pregnancy Nutrition
Evidence-based nutrition guidance for each trimester of pregnancy.
🩺 Prenatal Tests & Screenings
Understand the tests and screenings offered throughout your pregnancy journey.
🧘 Pregnancy Exercises
Safe exercises and physical activity guidelines for each trimester.
✅ Pregnancy Checklists
Trimester-by-trimester checklists to help you stay organized and prepared.
Evidence-Based Pregnancy Information
Our week-by-week pregnancy content is developed based on guidelines from the American College of Obstetricians and Gynecologists (ACOG), Centers for Disease Control and Prevention (CDC), National Institutes of Health (NIH), and peer-reviewed medical literature.