Due Date Calculator

Last Menstrual Period (LMP) Method

Most pregnancies last around 40 weeks, so typically the best way to estimate your due date is to add 40 weeks, or 280 days to the first day of your last menstrual period. This calculation is based on a 28-days cycle length of your menstrual period and our Pregnancy Due Date Calculator will do the adjustment for your estimated due date if you have longer or shorter cycles.

Conception Date Method

Conception is usually defined as the initiation of pregnancy, that is a date when a baby is conceived, the father's sperm fertilizes the mother's egg. Just add 266 days to get your estimated due date. Or select "conception date" and let our Pregnancy Due Date Calculator do the math for you.

Signs of Labour

• Blurred vision
• Fainting spells or dizziness
• Pain in your chest or belly
• Cramps in the lower belly
• Reversed fetal movements
• 4 or more contractions in 1 hour
• Sudden puffiness in your hands or face
• Fever above 100.4 degrees F (38 degrees C)
• Sudden weight gain of more than 2 pounds in 1 week
• Your baby’s movements have slowed down for 24 hours
• Your baby’s movements have fewer than 10 times in 2 hours
• You have light pink bleeding similar to a menstrual period in vaginal discharge
• You have water breaks, the waters are smelly or coloured in vaginal discharge

Check with your obstetrician if you are beginning to experience the early signs of labour. Or visit the hospital when you experience any of the above signs and contraction frequency increases.

Signs of Overdue

• When a pregnancy reaches 41 weeks and beyond
• You have a history of giving birth to post-term babies
• You have first-time pregnancy, then it could be an overdue
• Your family has a history of giving birth to post-term babies

Most doctors and midwives are happy for you to go a few days over your due date as long as everything seems to be okay. Many will let pregnant women go up to two weeks over. After 42 weeks, however, the baby's health might be at risk.