By: McKenzie Gray and Bethany Sprauer

What kind of hormone is it?

• They are a group chemically similar to steroids• A series of chemical reactions spurred by

enzymes that remove and add groups to cholesterol core

Steroidpregnenoloneandrogens• Aromatase enzymes convert androgens to

estrogens

Where does it come from

• The major source is the ovaries and placenta• Small amounts in

-male testes-adrenal glands-brain-fat

• Produced in small but significant amounts regularly

What does it do?• Causes uterine lining to thicken

during menstruation in preparation for pregnancy

• Stimulates growth of breast tissue• Maintains blood flow to the vagina• Helps development and operation

of the female reproductive tract

• essentially the hormone that creates sexual feelings and urges in females, both human and animal alike

• keeps the body from ovulating while a woman is pregnant, along with progesterone, another female hormone

• Lowest/highest

Negative or positive?

• Negative• Starts in hypothalamus then to the pituitary

and then to the FSH to turn on or off

What is it?• There are 3 major hormones that make up the estrogens• Estradiol: most common type of estrogen measured in non-

pregnant women, varies through menstrual cycle, drops very low during menopause

• Estrone: may be measured in women during menopause to check estrogen levels, also measured in men and women who may have cancer of the ovaries, testicles, or adrenal glands

• Estriol: usually only measured during pregnancy, produced in large amounts by placenta

• Estradiol is the predominate one

hyper

• early secretion of high levels of estrogen• Early appearance of puberty

Hypo

• Decreased in egg production• Other sexual functions