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Braxton Hicks vs. Real Contractions: How to Tell the Difference
Braxton Hicks vs real contractions: compare timing, pain and pattern, learn the 5-1-1 rule, and know when to call your provider or go to…
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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…
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Early Pregnancy Symptoms Before a Missed Period: What Is Real and What Is Not
Early pregnancy symptoms before a missed period: what’s real, a day-by-day timeline after ovulation, how it differs from PMS, and when to test.
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When to Take a Pregnancy Test: Days After Ovulation, Implantation & Missed Period
Wondering how soon you can test? See when hCG becomes detectable, how many days after ovulation to test, and how to avoid a false…
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Pregnancy Weight Gain Chart: How Much Is Healthy by BMI and Trimester
How much weight should you gain in pregnancy? See IOM and ACOG ranges by pre-pregnancy BMI for one baby and twins, weekly gain by…
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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.
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How 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…
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LMP 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.
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Understanding 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…
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Read the latest PregCalc articles on due dates, gestational age, ovulation, early pregnancy, labor and maternal health, explained in plain language.
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