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العربية
Pregnancy Calculator
Pregnancy Calculator
The Pregnancy Calculator can estimate a pregnancy schedule based on the provided due date, last period date, ultrasound date, conception date, or IVF transfer date.
About Pregnancy Term & Due Date
Pregnancy is a term used to describe a woman's state over a time period (~9 months) during which one or more offspring develops inside of a woman. Childbirth usually occurs approximately 38 weeks after conception, or about 40 weeks after the last menstrual period.
The World Health Organization defines a normal pregnancy term to last between 37 and 42 weeks. During a person's first OB-GYN visit, the doctor will usually provide an estimated date (based on a sonogram) at which the child will be born, or due date.
Pregnancy Trimesters
| Trimester | Weeks | Description |
|---|---|---|
| First Trimester | Week 1 - Week 12 | Initial development of organs and body systems |
| Second Trimester | Week 13 - Week 26 | Rapid growth and development |
| Third Trimester | Week 27 - Birth | Final development and preparation for birth |
Important Note
While the due date can be estimated, the actual length of pregnancy depends on various factors, including age, length of previous pregnancies, and weight of the mother at birth. Studies have shown that fewer than 4% of births occur on the exact due date, 60% occur within a week of the due date, and almost 90% occur within two weeks of the due date. Always consult with your healthcare provider for personalized medical advice.