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.