Fig 27.10 ovaries The ovaries & uterus are held in place by ligaments in the pelvic cavity...

Fig

27.10ovaries

The ovaries & uterus are held in place by ligaments in the pelvic cavity

Female reproductive system

• Ovaries– ligaments support and stabilize

• Uterine tubes• Uterus

– enclosed within broad ligament• Vagina• External genitalia

The Female Reproductive System

Homologies

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Development

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• Held in position by ovarian ligament and suspensory ligament

• Ovarian artery and vein enter at ovarian hilum

• Covered by tunica albuginea

The Ovaries

Ovary

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Ovary HistologyNice images also at Blue histology

You tube shotgun histology

• Ovarian cycle

• Occurs monthly in ovarian follicles

• Primordial follicles develop into primary follicles

• Theca granulose cells surround oocyte

– Release estrogens, estradiol

• Follicular fluid encourages growth of secondary follicles

• One mature Graffian follicle develops

• Primary oocyte undergoes meiosis producing secondary oocyte

• Ovulation

– Secondary oocyte surrounded by corona radiata released

Menstural Cycle

Fig

27.11

2-primary follicle 5-oocyte

Mature follicle

• Fimbriae• Infundibulum• Ampulla• Isthmus

Uterine (Fallopian) Tubes

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• Mechanical protection and nutritional support to developing embryo

• Bends anteriorly (anteflexion)

• Stabilized by broad, uterosacral, round, and lateral ligaments

Uterus

Compare cycles

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Menstrual Cycle

If fertilization does occur

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FYI

FYI

Sperm count range from

20 – 100 million sperm per cubic mL

Chorion - villi

Amnion

Chorionic gonadotropin

HCG

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FYI

FYI

FYI

772 in text book

FYI

FYI

FYI

Epidural shot

Amniocentesis and CVS

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