It is recommended to get acquainted with the theory of metaphors in order to be able to write metaphor essay in a competent way with the deep understanding of the purpose of metaphor essays writing.
Estradiol is the type of estrogen that is normally measured with testing, and a normal range is 30-400 pg/mL for premenopausal women (depending on where you are in your menstrual cycle) and 0-30 pg/mL for postmenopausal women. Levels lower than 20 pg/mL may cause hormonal symptoms such as hot flashes.
Their presence in both vertebrates and insects suggests that estrogenic sex hormones have an ancient evolutionary history. The three major naturally occurring forms of estrogen in women are estrone (E1), estradiol (E2), and estriol (E3). Another type of estrogen called estetrol (E4) is produced only during pregnancy. Quantitatively, estrogens circulate at lower levels than androgens in both men and women.