How Accurate Is Your Due Date? LMP vs. Ultrasound Dating Explained
Only a small share of babies arrive on their due date. See how LMP and ultrasound dating differ, when your date changes and what a normal birth window looks like.
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Pregnancy Weeks to Months Chart: How Many Months Pregnant Am I?
Pregnancy weeks to months chart: 40 weeks is about 9 months. Find your month, trimester and a week-by-week conversion table, plus the formula.
Read articleHow to Calculate Your Due Date (Step by Step)
Learn how to calculate your due date by hand with Naegele's rule: add 280 days to your last period, adjust for cycle length, and see when it can change.
Read articleLMP Dating: How It Works, How Accurate It Is & When It Changes
LMP dating counts 40 weeks from your last period. Learn Naegele's rule, how accurate it is, and when an ultrasound changes your due date.
Read articleUnderstanding Gestational Age: A Complete Guide
Gestational age counts pregnancy weeks from your last period. Learn how it is calculated, how it differs from fetal age, and when ultrasound changes your due date.
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