Webmd Baby Due Date Calculator

How to Use This Calculator

To calculate your baby's due date:

1. Enter the date of your first day of your last menstrual period (LMP) in the calculator.
2. Click the "Calculate" button.
3. Review the estimated due date and pregnancy timeline.

The calculator uses the standard 40-week pregnancy timeline, which is the average length of a full-term pregnancy. Most babies are born between 38 and 42 weeks of pregnancy.

How the Due Date is Calculated

The due date is calculated by adding 280 days (40 weeks) to the date of your last menstrual period (LMP). This is based on the average length of a full-term pregnancy.

For example, if your LMP was on January 1, 2023, your due date would be October 31, 2023.

Understanding Pregnancy Weeks

Pregnancy is divided into three trimesters:

• First Trimester (Weeks 1-12): This is when the baby's major organs and body structures begin to form. Many women experience morning sickness during this time.
• Second Trimester (Weeks 13-27): The baby grows rapidly, and many women notice their bump. This is often the most comfortable time of pregnancy.
• Third Trimester (Weeks 28-40): The baby prepares for birth, and the mother's body makes final preparations. This is when many women experience Braxton Hicks contractions and back pain.

Each week of pregnancy brings new developments and changes. Tracking your pregnancy week can help you understand what to expect and when to expect it.

Important Pregnancy Dates

Here are some key dates to remember during your pregnancy:

• Conception Date: The date when fertilization occurs.
• First Trimester Ultrasound: Typically scheduled between 11 and 14 weeks.
• Annual Checkups: Regular prenatal visits with your healthcare provider.
• Due Date: The estimated date of birth.

Tracking these important dates can help you stay organized and prepared for each stage of your pregnancy.