Development of Fetus + Pathophysiology of Reproductive System

8 weeks

Head nearly as large as body; all major brain regions present

Liver disproportionately large and begins to form blood cells

Limbs present, through initially webbed, finger and toes are free by the end of this interval

Bone formation has begun

Approximate crown-to-rump length: 22mm (0.9 inch); weight: 2 grams (0.07 oz)

12 weeks

Head still dominant but body elongating; brain continues to enlarge

Facial features present in crude form

Approximate crown-to-rump length at end of interval: 90mm (9 cm)

16 weeks

General sensory organs are present; eyes and ears assume characteristic position and shape; blinking of eyes and sucking motions of lips occur

Face looks human, and body is beginning to outgrow head

Approximate crown-to-rump lenth at end of interval: 140 mm (14cm)

17-20 weeks

Approximate crown-to-rump length at end of interval: 190 mm

21-30 weeks

Substantial increase in weight (may survive if born prematurely at 27-28 weeks, but hypothalamus still too immature to regulate body temperature

Approximate crown-to-rump length at end of interval: 280 mm

30-40 weeks

Bone marrow becomes sole site of blood cell formation

Testes enter scrotum in 7th month (in males)

Fat laid down in subcutaneous tissue of skin

Approximate crown-to-rump length at end of interval: 360 mm (14 inches); weight: 3.2 kg (7 pounds)

Phimosis

Narrowing of foreskin of the penis and misplaced urethral openings

Cryptorchidism

Failure of testes to make their normal descent

Puberty

Period of life, generally between the ages of 10 and 15 years (13 years old in males, 11 years old in females)

Escherichia Coli

Most common vaginal infection

Sexually Transmitted Microorganism

Gonorrhea Syphilis, Genital Warts, Yeasts (a type of fungus)

Urethritis, Prostatitis, Epididymitis

Most common Inflammatory conditions in men

Orchitis

Inflammation of the testes, can cause sterility

Tumors of the breast, Tumors of the Cervix

Most common reproductive cancers in adult women

Menopause

Ending child-bearing ability

Andropause

Aging men exhibit a steady decline in testosterone secretion and a longer latent period after orgasm.

Vernix caseosa

fatty secretions of sebaceous glands covers body; silklike hair (lanugo) covers skin