Ovulation & date d'accouchement
Understand your cycle, plan your pregnancy
Ovulation, fertile window, due date, and pregnancy calendar — clear, free, bilingual tools to plan with confidence.
This information does not replace medical advice. Consult a healthcare professional for fertility or pregnancy questions.
Free tools
Ovulation calculator
Estimate your ovulation date and fertile window from your last period and cycle length.
Due date calculator
Calculate your estimated due date (EDD) from last period, conception date, or IVF transfer.
Pregnancy weeks
Browse all 40 pregnancy weeks: baby size, body changes, and trimester tips.
Practical guides
Fertile window guide
Understand the fertile window, LH surge, cervical mucus, and how to optimize conception chances.
Pregnancy calendar guide
How to read a pregnancy calendar, count gestational weeks, and track development.
Continue with the parenting cluster
After your pregnancy calendar: explore baby-name meanings and nutrition calculators.