Pregnancy Guides
These guides support the calculators by explaining the method, limitations, and practical context behind common date questions.
Key points
- Common due date and pregnancy week methods.
- Checkup and planning priorities by pregnancy stage.
- Practical notes about ovulation, pregnancy testing, and fetal movement awareness.
How to Calculate Pregnancy Due DateDue date is commonly estimated from the first day of the last menstrual period using a 280-day or 40-week model. It works best when cycles are relatively regular, but it is still an estimate.
Pregnancy Trimesters ExplainedPregnancy is commonly divided into first, second, and third trimesters. Each stage has different body changes, checkup priorities, and planning needs.
When to Take a Pregnancy TestTiming affects pregnancy test reliability. Testing too early can produce a false negative because hCG may not be high enough yet.
How to Count Fetal MovementsFetal movement awareness is one way to observe patterns later in pregnancy. The goal is not comparing with others, but knowing your baby’s usual pattern.
Ovulation Symptoms and Fertile WindowThe fertile window usually includes several days before ovulation and a short time after. Body signs can help, but they do not guarantee exact ovulation timing.
More pregnancy tools
IVF Due Date CalculatorEstimate due date from embryo transfer date and embryo age.Pregnancy Week CalculatorUnderstand how pregnancy weeks are counted.Conception Date CalculatorEstimate possible conception date from due date, ovulation, or LMP.Pregnancy Test Timing CalculatorEstimate when testing may be more reliable.Ultrasound Due Date vs LMP DifferenceUnderstand why ultrasound dating and LMP dating may differ.
Pregnancy Articles
Practical explainers on conception, early signs and counting weeks — read them alongside the tools. See all articles