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.
Modify the values and click the calculate button to use
Note: The results of this calculator are estimations based on averages for a single pregnancy. The results for twin pregnancy or multiple pregnancy are different.
Pregnancy Overview
Pregnancy is the ~9-month period when one or more babies develop in the womb. Most births occur about 38 weeks after conception (40 weeks from the last menstrual period), with normal pregnancies lasting 37-42 weeks. Doctors estimate a due date using ultrasound or the last menstrual period, though only 4% of women deliver on this exact date – most births occur within two weeks of the estimated date.
Detection
Pregnancy can be identified through:
- Home urine tests (accurate 6-8 days after fertilization)
- Blood tests (more sensitive but costly)
- Physical symptoms like missed periods, nausea, and fatigue
Prenatal Care
Key management areas include:
- Medications – Consult your doctor as many drugs are classified by fetal risk (FDA categories A-X)
- Weight Management – Recommended weight gain:
- Normal BMI: 25-35 lbs
- Underweight: 28-40 lbs
- Overweight: 15-25 lbs
- Obese: 11-20 lbs
- Exercise – Regular aerobic activity is beneficial unless experiencing:
- Bleeding
- Dizziness
- Decreased fetal movement
- Other concerning symptoms
- Nutrition – Critical needs include:
- Folic acid (reduces birth defect risk)
- DHA omega-3 (brain development)
- Increased micronutrient intake
- Personalized dietary planning with professionals
This version maintains all key information while being more scannable and organiser. The content flows from general concepts to specific management areas, with clear bullet points for easy reference. Medical recommendations are preserved but presented more concisely.