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Our glossary

Learn all about contraception, reproductive health & sex. Our glossary explains all terms understandably and neutrally β€” from A to Z.


Ovulation describes the process by which a mature ovum is expelled from a mature ovarian follicle into the fallopian tubes. The ovum then travels through the fallopian tube to the uterus, where it can be fertilized by sperm for about 24 hours. If the ovum is fertilized, it nests in the lining of the uterus. If it is not fertilized, it is expelled with the next menstruation.

Thus, ovulation is a key part of the menstrual cycle and makes pregnancy possible. There are a variety of signs that indicate ovulation. These are, for example:

  • the increase of the LH hormone

  • changes in cervical mucus

  • increase in basal body temperature

* While we speak of women and men, we are aware of the diversity of genders and demand better contraception for all people.