Chapter 9: Part 4 Menstrual and Estrous Flashcards
what is the menstrual cycle?
The female reproductive cycle of most primates, including humans; characterized by growth of the lining of the uterus, ovulation, development of a corpus luteum, and (if pregnancy does not occur) menstruation.
what is an estrous cycle?
The female reproductive cycle of mammals other than primates.
what distinguishes menstrual cycles and estrous cycles??
monthly growth and loss of lining of the uterus
how long does a rats estrous cycle take?
four days
Women make ___ ovarian follicle each month.
one but two can happen which leads to twins
what does the ovarian follicle release?
an ovum
what does the ruptured ovarian follicle become?
a corpus luteum
what does a corpus luteum produce?
estradiol and progesterone
what is progesterone?
A steroid hormone produced by the ovary that maintains the endometrial lining of the uterus during the later part of the menstrual cycle and during pregnancy; along with estradiol, it promotes receptivity in female mammals with estrous cycles.
Sexual behavior of male rodents depends on….
testosterone
if a male is castrated, if testes are removed, what happens?
sexual activity eventually ceases, but can be injected with testosterone to help with that
the sequence of estradiol followed by progesterone has three effects on female rats…. which are…
receptivity, proceptivity, and attractiveness
what did Roberts et al. (2004) find?
took photos of women’s faces during fertile and nonfertile periods of their menstrual cycle and found that both men and women judged the photos taken during the fertile period as more attractive than those taken during a nonfertile period.
what arouses a male rat/
odor and her behavior
what do male rats do when a females ovaries are removed?
ignore her, but injection will help
