Today• Spermatogenesis • Oogenesis• Hormonal control of menstrual cycle• Fertilization

Spermatogenesis• Process• Location(s)• When

Oogenesis• Process• Location(s)• When

Hormones – Biofeedback

• FSH – follicle stimulating hormone• Released by pituitary gland• Stimulates follicle development (where the egg is)• Stimulates follicle to release Estrogen• The increase in estrogen in the blood triggers the

pituitary to release luteinizing hormone (LH)• Triggers release of egg from follicle• Stimulates follicle to form corpus luteum• Corpus luteum releases estrogen and progesterone

Hormones – Biofeedback

• Stimulates follicle to form corpus luteum• Corpus luteum releases estrogen and progesterone• Progesterone (along with estrogen) promotes

thickening of uterine walls (for implantation)• If zygote doesn’t implant, corpus luteum

degenerates• Leads to decrease in progesterone and estrogen• Leads to increase in FSH…• And the cycle continues

Hormones – Biofeedback

Homework

Hormones – Biofeedback

• Stimulates follicle to form corpus luteum• Corpus luteum releases estrogen and progesterone• Progesterone (along with estrogen) promotes

thickening of uterine walls (for implantation)• If zygote doesn’t implant, corpus luteum

degenerates• Leads to decrease in progesterone and estrogen• Leads to increase in FSH…• And the cycle continues