Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 53 - Animal Development - Figure 53.28 - Inquiry Question: 1


High levels of estradiol and progesterone would often, but not always, prevent ovulation even when a woman wasn't pregnant.

Work Step by Step

The effect of high levels of these hormones occurs no matter what else is going on in the woman's body. It should be noted that from the first research in this area, it has been known that breakthrough ovulation often occurs with the kinds of high levels used in hormonal contraceptives.
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