What is computational due date calculation?

Pregnancy care has advanced tremendously in the last 200 years, but most due date calculators are based on a simple formula called Naegele's Rule popularized in 1812. The simple formula does not take into account that the length of pregnancy changes based on the mother's and baby's characteristics. In addition, there is no one normal length of pregnancy, but a range of healthy pregnancy lengths. By just providing a single number, the forumula makes it seem like a baby should be born on a certain day which can cause confusion and increase anxiety for the mother.

Computational due date calculation does not rely on a simple formula. Instead, it uses powerful computer algorithms to match your pregnancy to over 11 million births to find similar pregnancies. Based on those similar pregnancies, it can provide accurate, personal, and meaningful estimates of when your baby will be born.

Try out True Due Date by entering your information below.

Results

You are {{ctrl.weeks_pregnant}} pregnant today

Current Most Likely Due Date: {{ctrl.due_date}}

Chance of being born on exact due date: {{ctrl.due_date_percent}}%

Median due date overall: {{ctrl.due_date_median}}

Median due date now: {{ctrl.due_date_median_current}}

Most likely week ({{ctrl.due_week_percent}}% chance): {{ctrl.due_week_start}} to {{ctrl.due_week_end}}

Fifty percent chance of being born: {{ctrl.due_p50_start}} to {{ctrl.due_p50_end}}

Eighty percent chance of being born: {{ctrl.due_p80_start}} to {{ctrl.due_p80_end}}


Calculate based on

Ultrasound weeks

Ultrasound days

{{ctrl.calculate_by.name}}

Age at start of pregnancy

(Optional) Choose mother's age at start of pregnancy

Race

(Optional) Choose mother's race

Hispanic Origin

(Optional) Choose mother's Hispanic origin

Baby's Birth Order

(Optional) Choose what number baby this is for you.

Baby's Sex

(Optional) Choose the baby's sex if known

Twins

(Optional) Choose whether you are pregnant with twins. We do not have enough data about triplets and higher to be able to calculate due dates for them.

Mother's Height

(Optional) Select mother's height

Pre-pregnancy weight

pounds

(Optional) Enter how much the mother weighed before pregnancy

Tobacco Use

(Optional) Select whether the mother uses tobacco products

Diabetes

(Optional) Select whether the mother is diabetic


Questions or comments about True Due Date? Email [email protected]

© Dr. John R. Bandela, MD 2015.

Disclaimer

This site is for general information and educational purposes only. Any reliance you place on this information is at your own risk. Only your physician or other health-care provider can accurately determine your due date based on knowledge of your complete medical condition. Please discuss all medical issues with your health-care provider. No physician-patient relationship is implied by use of this site.