Reproductive Hormones

Reproductive Hormones

Male gonads (testes) produce sperm.

Female gonads (ovaries) produce eggs.

Male Reproductive System

Sex hormones: androsterone & testosterone. Function:

Stimulates spermatogenesis.Stimulates secondary sex characteristics. Increases secretion of body oils. Increases sex drive.

Male Reproductive System

Female Reproductive System

Sex hormones:

Estrogen & Progesterone

Female Reproductive System

Ovaries contain cells called follicles. Follicles consist of:

Primary oocyte. Granulosa cells.

Oogenesis

FSH & LH released. Primary oocyte undergoes meiosis I.

Forms a secondary oocyte and a polar body.

Granulosa cells divide.Forms a fluid-filled cavity (antrum) around the

secondary oocyte.Serves as nutrition for oocyte.

Ovulation

Secondary oocyte ruptures ovarian wall.Enters the fallopian tubes.

Remaining follicle cells form the corpus luteum.Secretes estrogen and progesterone.

Oogenesis & Ovulation

Meiosis II is Dependent on Fertilization

No fertilization?Corpus luteum degenerates and leaves a scar

(corpus albicans).

Fertilization?Meiosis II occurs.Secondary oocyte divides to form a fertilized

egg/ovum (zygote) & a polar body.

Female Reproductive

System

Menstrual Cycle

4 phases:Flow (day 0 – 5).Follicular (day 6 – 13).Ovulatory (day 14).Luteal (day 15 – 28).

Menstrual Cycle

*Males and females both have male and female sex hormones, but in varying

levels.