Pregnancy usually lasts 280 days (40 weeks) from the first day of the woman’s last menstrual period. Here’s a link to our interactive Due Date Calculator that will help you estimate the date your baby will arrive.
Remember, though, that this calculator is a general guide: every pregnancy is unique, and sometimes babies arrive sooner or later than expected. Always talk to your health care provider about your due date. And be sure you know the signs of preterm labor and what to do, just in case.