DISCLAIMER: The Pregnancy Calculator below is an estimation of weeks from reported last normal menstrual period and does not constitute medical advice. A missed period does not necessarily mean that you are pregnant, and having a period does not mean you are not pregnant. Only an exam, pregnancy test, or ultrasound by a physician can confirm pregnancy and approximate length of pregnancy. The calculator should be used as a guide only and should not be relied upon for weeks of pregnancy, conception date, or due date.
To estimate the length of your pregnancy, enter the first day of your last period and then press 'calculate'.