
Use our free maternal health calculators to find your due date based on the date of your last menstrual period, Or help plan fertilization with our ovulation calculator.
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Pregnancy due dates are typically estimated as 40 weeks (280 days) from the first day of your last menstrual period (LMP). This is based on standard obstetric dating used in prenatal care.
It is important to understand that due dates are estimates, not exact delivery predictions. Many pregnancies vary by 1–2 weeks in either direction.
Ultrasound measurements in early pregnancy may adjust the estimated due date if there is a significant difference from LMP-based dating.
This calculator is designed for educational purposes and does not replace medical care or clinical evaluation
Ovulation typically occurs about 14 days before the start of the next menstrual period. This timing can vary depending on cycle length and individual hormonal patterns.
The fertile window includes the days leading up to ovulation and the day of ovulation itself. This is because sperm can survive in the reproductive tract for several days.
Cycle length variations can shift ovulation timing, which is why estimates are based on averages rather than exact predictions.
This calculator provides general educational estimates and should not be used as a sole method of contraception or fertility planning.

At Hygeia Mama, we provide evidence-informed tools and educational resources to support pregnancy planning, fertility awareness, and maternal health understanding.
This page includes recommended products and tools that may be helpful for tracking cycles, supporting early pregnancy, and understanding reproductive health. Some links may be affiliate links, which means we may earn a small commission at no additional cost to you.
All recommendations are based on general usefulness, accessibility, and relevance to commonly used reproductive health practices.
These tools are commonly used to better understand ovulation timing and menstrual cycle patterns:
These tools may support understanding reproductive timelines and pregnancy progression:
These are commonly used products during early pregnancy to support nutritional needs and general wellness:
These resources are provided for educational purposes only. They are not a substitute for medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for individualized medical guidance.
Some links on this page may be affiliate links. If you choose to purchase through them, HygeiaMama may earn a small commission at no additional cost to you. This helps support the maintenance of free educational tools and content.
Early pregnancy detection tools used for home-based testing:
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Dr. Jill is a Public Health Doctor and Epidemiologist. She is registered in ID, license 6961268. She uses her expertise to analyze your medical history and provide evidence-based recommendations. Our services are not meant to substitute or replace those of your medical doctor, but are meant to work in conjunction with them.

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