Show Summary Details
Page of

Ovaries and the menstrual cycle 

Ovaries and the menstrual cycle
Ovaries and the menstrual cycle

Enda McVeigh

, John Guillebaud

, and Roy Homburg

Page of

PRINTED FROM OXFORD MEDICINE ONLINE ( © Oxford University Press, 2021. All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single chapter of a title in Oxford Medicine Online for personal use (for details see Privacy Policy and Legal Notice).

date: 23 September 2021



The ovary

Follicular development

Causes of anovulation and oligo-ovulation

Normally, ovulation occurs once a month in the fertile age range between menarche and menopause, although anovulation generally occurs at the extremes of reproductive life. A cycle is regarded as normal if the duration is 24–35 days. The time between menstruation and ovulation is termed the follicular phase and between ovulation and the next menstruation, the luteal phase. Ovulation itself is the release of a mature, fertilizable oocyte from the dominant follicle, the culmination of an integrated, synchronized interplay of hormones from three principal sources: ...

Access to the complete content on Oxford Medicine Online requires a subscription or purchase. Public users are able to search the site and view the abstracts for each book and chapter without a subscription.

Please subscribe or login to access full text content.

If you have purchased a print title that contains an access token, please see the token for information about how to register your code.

For questions on access or troubleshooting, please check our FAQs, and if you can't find the answer there, please contact us.