Reproductive Hormones. Male gonads (testes) produce sperm. Female gonads (ovaries) produce eggs.

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Reproductive Hormones

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Presentation transcript:

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.