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The human female reproductive cycle is regulated primarily by the
white blood cells of the circulatory system
muscle cells of the skeletal system
enzymes of the digestive system
hormones of the endocrine system

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Hormones of the endocrine system

The human female reproductive cycle is regulated primarily by the hormones of the endocrine system. Thus, option "D" is correct.

What are the two main classes of hormones?

There are two major classes of hormones 1. Proteins, Peptides, and modified amino acids 2. Steroids. In general, steroids are se× hormones related to se×ual maturation and fertility.

Thus, option "D" is correct.

To learn more about hormones  click here:

https://brainly.com/question/13020697

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