text 519 words : https://my.clevelandclinic.org/health/articles/10132-menstrual-cycle

video 9'52 : https://youtu.be/3Lt9I5LrWZw?si=p7hq8v3LQ9W62h2W This video goes through the hormonal and physiological changes that occur during the menstrual cycle. CORRECTION FSH does not start the development of the follicles. The follicles are constantly developing from primordial follicles to primary follicles to secondary follicles. FSH stimulates further development of a number of these into mature follicles at the start of the menstrual cycle (rather than initiating the development as the video suggests).

Quizz : https://www.proprofs.com/quiz-school/story.php?title=anatomy-chapter-23-test-pregnancy-growth-and-development