UCSB Science Line
Sponge Spicules Nerve Cells Galaxy Abalone Shell Nickel Succinate X-ray Lens Lupine
UCSB Science Line
How it Works
Ask a Question
Search Topics
Our Scientists
Science Links
Contact Information
In my AP Bio class we were learning about the female reproductive cycle. We learned that an increase in estrogen causes the anterior pituitary to release a surge of luteinizing hormone, which releases the egg (ovulation). I also read on-line that "the pill" contains hormones, estrogen and progesterone, and these stop ovulation, but keep the rest of the cycle going. If estrogen is what causes ovulation, how can the estrogen in the pill stop ovulation? Thanks, and sorry if my question doesn't make sense. Ashley
Question Date: 2006-04-24
Answer 1:

I think the key thing to note is that a spike in the estrogen level leads to ovulation. With the pill, the level of estrogen is high, but constant. Without the spike ovulation does not occur.

Click Here to return to the search form.

University of California, Santa Barbara Materials Research Laboratory National Science Foundation
This program is co-sponsored by the National Science Foundation and UCSB School-University Partnerships
Copyright © 2020 The Regents of the University of California,
All Rights Reserved.
UCSB Terms of Use