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Pregnancy Calculator

Calculate your current pregnancy week, trimester, due date and get helpful health suggestions.



Pregnancy Term and Due Date

Pregnancy refers to the period, typically lasting about nine months, during which a baby develops inside the uterus. Childbirth usually occurs around 40 weeks from the first day of the last menstrual period (LMP), or approximately 38 weeks after conception.

A full-term pregnancy is generally defined as lasting between 37 and 42 weeks.

How a Due Date Is Estimated

A due date is most commonly estimated using the first day of the last menstrual period or confirmed through an early ultrasound. During the first prenatal visit, healthcare providers often refine this estimate based on fetal measurements.

How Accurate Is a Due Date?

A due date is an estimate, not a guarantee. Fewer than 5% of babies are born on their exact due date. Most deliveries occur within one to two weeks before or after it.

Why Pregnancy Length Can Vary

The exact length of pregnancy differs from person to person. Factors such as maternal age, genetics, prior pregnancy history, and overall health can all influence when labor begins.

Even with modern medical tools, predicting the exact day of birth is not currently possible.

Pregnancy Detection

Pregnancy may be detected through physical symptoms or by using pregnancy tests. Common early signs include a missed period, fatigue, nausea, increased urination, and breast tenderness.

Pregnancy tests work by detecting the hormone human chorionic gonadotropin (hCG), which is present only during pregnancy. Blood tests can detect pregnancy slightly earlier than urine tests, but home urine tests are accurate when used correctly.

Managing a Healthy Pregnancy

Pregnancy management involves careful consideration of medications, weight gain, physical activity, and nutrition. Individual needs can vary widely, so medical guidance is essential.

Weight Gain During Pregnancy

Healthy weight gain supports fetal development and maternal health. Gaining too little or too much weight can increase the risk of complications such as gestational hypertension or cesarean delivery.

Exercise During Pregnancy

Regular physical activity can improve cardiovascular fitness, reduce pregnancy discomforts, and support mental well-being. In uncomplicated pregnancies, moderate exercise is generally safe.

Nutrition Needs

Pregnancy increases the need for certain nutrients, including folic acid, iron, calcium, and omega-3 fatty acids. A balanced diet supports healthy growth and development.

Frequently Asked Questions

Can my due date change during pregnancy?

Yes. Due dates may be adjusted if early ultrasound measurements differ significantly from the initial estimate.

Is it normal to go past my due date?

Yes. Many healthy pregnancies continue past the due date and still result in safe deliveries.

Should I follow general advice or personal medical guidance?

Always prioritize guidance from your healthcare provider, as recommendations should be tailored to your specific situation.

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