Ovulation and fertile window calculator
Ovulation, fertile window and next periods over three cycles, with what this calculation is really worth.
Contraception
This page reviews every method of contraception, from the most reversible to the most permanent, and gives for each its real-world effectiveness rather than the theoretical figure.
Pregnancy
The clinical care looks much the same everywhere. What differs completely is who pays for it and how long you can stop working.
Abortion
Between the legal time limit and actual access there is always a gap. That gap decides more than the statute does.
Assisted reproduction
One person in six is affected by infertility at some point in life (WHO, 2023). Medicine has answered for forty years with a handful of well-identified techniques — everything else is eligibility, waiting, money and law, and…
Research
Sources
- Chapter 1 - Combined Oral Contraceptives — Family Planning: A Global Handbook for Providers — World Health Organization and Johns Hopkins Center for Communication Programs, accessed 2026
- How well contraception works at preventing pregnancy — National Health Service (NHS), 2024
- Infertilité — World Health Organization (WHO), accessed 2026 (in French)
Official or institutional documents this page relies on, consulted on 12 October 2026. Links open in a new tab.
Content updated in . The instruments cited can change: if in doubt, confirm with the official source given.
Text written with the help of AI, under the editorial responsibility of CAPIT; human reviews are occasional (method and sources: About). This content does not replace medical or legal advice. Spotted an error? Write to us.
Why these five pages sit together
Because they concern the same people at different moments. First you try to avoid a pregnancy, then to achieve one, and sometimes you have to end one in between. Treating these subjects separately gives a false impression: that of distinct populations, when it is a single trajectory.
What these pages have in common
Each of them rests on an effectiveness figure or a time limit, and both change completely from one country to the next — the age of access without parental consent, what is reimbursed, the legal limit for a termination, eligibility for assisted reproduction. The general page says what is true everywhere; the country page says what applies where you live. Never read one without the other when a deadline is involved.
One useful marker to begin with: the effectiveness printed on a leaflet is perfect-use effectiveness. The figure that matters is typical use, missed doses included, and the gap between the two reaches a factor of twenty for some methods.
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