Your trusted pregnancy companion with detailed week-by-week fetal development, maternal health changes, nutrition guidance, and free pregnancy calculators. Expert-reviewed information for expectant mothers from conception to birth.
Calculate your exact due date and current pregnancy week
Track your baby's growth from week 1 to 40
Evidence-based information from trusted medical sources
Explore detailed information for each week of your pregnancy journey. Learn about fetal development milestones, maternal changes, symptoms, and important tips for a healthy pregnancy.
Use our accurate pregnancy calculators to determine your due date, find your current pregnancy week, or calculate conception date. All calculations are based on medical standards.
Enter the first day of your last menstrual period (LMP) to calculate your estimated due date.
Determine how many weeks pregnant you are based on your last menstrual period.
Estimate when conception occurred based on your due date.
Pregnancy due date calculators are approximately 80% accurate when based on the last menstrual period (LMP). Only about 5% of babies are born exactly on their due date, with most births occurring within 2 weeks before or after the estimated date. Our calculator uses the standard Naegele's rule for the most accurate estimation.
The first trimester (weeks 1-12) is crucial for organ development. During this time, your baby's neural tube forms, the heart begins beating around week 6, and all major organs start developing. You may experience morning sickness, fatigue, and breast tenderness. Taking prenatal vitamins with folic acid is essential during this period.
Schedule your first prenatal appointment as soon as you get a positive pregnancy test, ideally around 8-10 weeks of pregnancy. Early prenatal care is crucial for monitoring your health and your baby's development. Your doctor will confirm the pregnancy, calculate your due date, and begin regular check-ups.
Pregnancy symptoms vary by week and individual. Early signs include missed periods, nausea, breast tenderness, and fatigue. As pregnancy progresses, you may experience food cravings, heartburn, back pain, and fetal movement. Our week-by-week guide provides detailed information about symptoms to expect during each stage.
Pregnancy is calculated from the first day of your last menstrual period (LMP), not from conception. This method, called gestational age, assumes a 28-day cycle with ovulation occurring on day 14. Although conception typically happens about 2 weeks after LMP, this standardized calculation helps healthcare providers track pregnancy progress accurately.