How to Figure Out When Your Baby Is Due?

A due date is easy to calculate if you keep track of the dates of your menstrual cycle. If you have irregular cycles or have been using certain types of birth control, the estimated due date will be a bit harder to determine. Because early pregnancy care is important for a successful pregnancy, the sooner you know this information, the better informed you will be in scheduling the proper appointments and tests. If necessary, your physician can use palpitation of the uterus and ultrasound to help you figure out your estimated due date.

Things You'll Need

  • Calendar
  • Online due date calculator
  • Physician appointment
  • Ultrasound

Instructions

    • 1

      Use a calendar to figure out the first day of your last menstrual period. Conception usually occurs about two weeks after this date.

    • 2

      Count forward 40 weeks from the first day of your last period. This will give you an approximate idea of your due date. A typical pregnancy lasts 38 to 42 weeks.

    • 3

      Use an online due date calculator to double check the due date of the baby. You'll need to enter the first day of your last menstrual period. See resources below.

    • 4

      Schedule an appointment with your obstetrician. Even if you aren't sure of your last menstrual period, your doctor can approximate how far along you are by the position of your uterus.

    • 5

      Follow through on any ultrasounds ordered by your physician. The ultrasound technologist will use measurements to determine the due date. The baby's size and shape will change with each stage, making it easy to pinpoint where he is in his fetal development.

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