Page 127 - The Miracle of Hormones

6
Negative feedback
inhibits hypothalamus.
5
1 Towards the end of cycle, lev-
Hypothalamus secretes els of estrogen and progester-
releasing hormones one in blood rise.
Uterus Endonetrium

Negative feedback

2
Anterior pituitary se- 3 4
cretes FSH and LH Estrogen and
Follicles and corpus progesterone
luteum secrete estro- cause growth of
gen and progesterone
endometrium in
the uterus.

Estrogen and pro-
gesterone also cause
onset of puberty (fe-
male body character-
Ovary istics and sex drive).
Corpus luteum

Adiagram showing the structure of the hormonal system in females.
With the secretion of FSH and LH from the hypothalamus, the hormonal
system is activated. The estrogen and progesterone secreted as a re-
sult of this causes a female to enter puberty.