Final answer:
Hormones produced by the endocrine system play a role in sexual motivation and behavior in women. Testosterone levels have been found to influence sexual motivation in women. Cyclic increases in estrogen can also increase both fertility and sexual motivation in women.
Step-by-step explanation:
Sexual motivation and behavior in women are influenced by hormones produced by the endocrine system. While there is ongoing research into the specific hormones associated with women's sexual desire, there is considerable evidence that circulating testosterone levels play a role in sexual motivation for all genders. Additionally, cyclic increases in estrogen can increase both fertility and sexual motivation in women.