Lecture 13: Male and Female Reproductive System (Exam 3) Flashcards

(39 cards)

1
Q

WHat diseases are covered in this lecture?

A

Sexually-transmitted disease
-Gonorrhea
-Syphilis
-Chlamydia
-Herpes

Male
-Infertility
-Cryptorchidism
-Torsion
-Benign Prostatic Hypertrophy
-Prostatitis

Female
-infertility
-Amenorrhea
-endometriosis
-eclampsia/Pre-eclampsia
-ectopic Pregnancy
-Mastitis

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2
Q

Where does spermatogenesis begin?

A

testes

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3
Q

What is infertility?

A

inability to conceive within one year
-monthly probability 20%-25%
-infertility has not increased
-screening and treatment options have

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3
Q

What is infertility?

A

inability to conceive within one year
-monthly probability 20%-25%
-infertility has not increased
-screening and treatment options have

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4
Q

What are the causes of infertility?

A

appx 11% of US reproductive age population
most case are treated with medication or therapy
-less than 3% of cases are treated with Assisted Reproductive Technologies (ART)

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5
Q

Describe ways of Female Infertility

A

Ovulatory
-anything that impacts ova production will reduce fertility

Tubal
-structural damage to oviducts will prevent the movement of ova or fertilization

Uterine
-Damage can prevent implantation or maintenance of pregnancy

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6
Q

What are the ovulatory causes?

A

Endocrine
-Hypothalamus/pituitary disease
-insufficient production of gonadotropins

Ovarian Disease
- polycystic ovarian syndrome (eg. Gonadotropin insufficiency; direct ovarian damage)

Other causes
Chemotherapy/pelvic irradiation
-destroys developing oocytes

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7
Q

What are Tubal/Uterine causes?

A

infections
-resulting in inflammation, scars, adhesions
-block transport/implantation
-ectopic pregnancy

Pelvic/Abdominal surgeries
- can also cause scarring/adhesions

Exposure to toxins
- Damage to the endometrium

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8
Q

Other causes of infertility

A

Thyroid disease
-excessive thyrotropin-releasing hormone induces PRL secretion (at high levels, will suppress GnRH release)
-response to low thyroid hormone levels

Androgen excess
-affects oocyte development
-anovulation and amenorrhea
-Genetic, and environmental causes

Hyperprolactinemia
-drugs that alter PRL secretion
-damage to pituitary

-Both prevent dopamine from inhibiting PRL secretion
-Effect on fertility may be related to excessive dopamine
-Altered gonadotropin release
-Direct effect on follicles

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9
Q

Whare the three types of male infertility?

A

Pretesticular
-endocrine disorders
-drugs

Testicular
-trauma, infections
-environmental, developmental

Post-testicular
-Tubal obstruction
-Autoimmune
-Developmental

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10
Q

What are the factors spermatogenesis?

A

Pretesticular Causes
hormones and medications
systemic diseases
environmental/lifestyle factors
dieary deficiencies
Toxins

Testicular causes
testicular temperature (elevated)
ionizing radiation alkylating agents
developmental disorders
local infections

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11
Q

What are pretesticular causes

A

-focuses on hormones that promote spermatogenesis

-Hypothalamus0pituitary deficiencies
-affect hormone production
-reduced testosterone slows spermatogenesis

Or drugs that inhibit their effects
-anabolic steroids initiate a negative feedback loop that reduces LH/FSH levels

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12
Q

What are testicular causes?

A

direct effect on testicular function
-most common cause of reduced male fertility is varicocele

Varicocele: abnormally dilated scrotal veins
-the scrotal temperature is increased

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13
Q

What can cause testicular damage?

A

Trauma (reversible with early intervention)
-Damage can result in atrophy
-Antisperm antibodies form when compartmentalization breaks down

Torsion of the spermatic cord
-Disrupted blood flow-ischemic damage

Infections
-swelling causes necrosis, atrophy

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14
Q

What is testicular torsion?

A

This occurs primarily in 2 circumstances
-neonatal- in utero or shortly after birth; no anatomic defect
-Adult-usually in adolescence

Adult Torsion
-Sudden onset of testicular pain
-no apparent injury/cause
-linked to a bilateral anatomic defect that increases mobility

-Considered a vascular disorder as twisting of the spermatic cord will reduce/ eliminate venous drainage
-The veins are unusually thick-walled (pampiniform plexus )
-Will remain patent

-Leads to infarction (emergency)
-If torsion is revered within 6 hours, generally have a full recovery

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15
Q

What are other testicular causes?

A

-Genetic diseases that impact sperm
-Klinefelter syndromee
-Microdeletions on the Y chromosome
Cryptorchidism (failure of descent)
-Developmental disorder

Toxins
-Different cells have different sensitivities
-cigarette smoke

16
Q

What is Cryptorchidism?

A

-Complete or partial failure of testes to descend during fetal development
-Higher temperature impairs function
-Structural changes (microscopic) are apparent by 2 years of age
-Lack of germ cell development (no spermatogonia, spermatocytes, spermatids)
-Hyalinization and thickening of basement membrane

17
Q

What are post-testicular causes?

A

Ductal obstructions (vas derens, epididymis)
-surgical (trauma, vasectomy)
-congenital (cystic fibrosis)

Ejaculatory issues
-Duct obstruction (congenital or acquired)
-Anejaculation (spinal cord injuries)

Infections (STDs, E. coli)
-can be due to urinary tract abnormalities

18
Q

What are specific sexually transmitted infections?

A

Bacterial (gram negative)
-GOnorrhea (Neisseria gonorrhoeae)
-Chancroid (Haemophilus ducreyi)
-Granuloma inguinale (Klebsiella granulomatis)
-Syphilis (spirochete: Treponema pallidum)

Bacterial (obligate intracellular)
-Chlamydia (chlamydia trachomatis)

Viral
-Genital Herpes (HSV2 infection; viral)

19
Q

What is Gonorrhea?

A

Infection with Neisseria Gonorrhoeae
-Males; causes urethritis
Females: often asymptomatic; may lead to pelvic inflammatory disease and infertility

in newborns, can causes blindness

20
Q

What is Syphilis?

A

-infection with treponema pallidum (spirochete)
-can cross the placenta (congenital)

21
Q

What is Lymphopathia Venerea?

A

Type of chlamydia
-aka lymphogranuloma venereum
infection with specific serotypes (L type)

Chronic infection
-initial lesion is small
-growth leads to swelling of lymph nodes
-can lead to lymph node rupture
-if untreated, causes fibrosis and structure in structures of the lower urogenital tract

Other genital chlamydia infections appear clinically like gonorrhea

22
Q

What is Herpes simplex virus infection?

A

Both HSV-1 and HSV-2 infect mucosa
-HSV-2 more likely to cause genital herpes

Can infect nearby nerves and remain latent
-activated by stress, trauma, U irradiation, hormonal changes

-Causes lesions on the skin

-Can also cause:
-Corneal lesions (blindness)
-Encephalitis
-Bronchopneumonia
-Esophagitis
-Hepatitis

Cells are multinucleated

23
Q

What are disorders of female reproduction involving disruption of menstruation?

A

Hormonal Control
-Pituitary hormones act on the ovaries
-FSH (follicle development, estrogen). Follicle-stimulating hormone
-LH (follicle maturation, progesterone) luteinizing hormone

Ovarian hormones act on the uterus
-estrogen (produced by follicle prior to ovulation; stimulates proliferative phase)
-progesterone (produced by corpus luteum; stimulates secretory phase)

24
Explain the hormonal cycle.
-Complex interaction of hormones -pregnancy halts the cycle in the secretory phase -other structures are involved
25
What are some menstrual disorders?
Amenorrhea -lack of menstrual bleeding Dysmenorrhea -irregular menstrual symptoms -excessive pain Menorrhagia -excessive bleeding Metrorrhagia -irregular/protracted bleeding
26
What is Amenorrhea?
-normal (pregnancy, menopause) -uterine disorder -scarring after infection Ovarian disorder -gonadal failure (multiple causes) -Resistance to gonadotropic hormones Endocrine disorder -insufficient gonadotropin secretion
27
How does stress affect amenorrhea?
stress --> increase cortisol--> change GnRH-->change in LH and FSH levels--> Amenorrhea
28
What is endometriosis?
Presence of endometrium outside the uterus -causes infertility if it affects other parts of the reproductive tract - causes intestinal disorders when it affects the intestines -pathogenesis is not well understood -Symptoms include: Dysmenorrhea, pelvic pain
29
What is an ectopic pregnancy?
-implantation of embryo anywhere but the uterus -appx 90% in the uterine tissue -Predisposing condition: a pelvic inflammatory disease that results in chronic salpingitis -most common cause of tubal hematoma -Fertilized ovum develops as usual: -forms a placenta -Amniotic sac suggests surrounds the developing fetus --Growth of fetus will cause rupture of the uterine tube -may undergo regression and resorption or spontaneous ejection into the abdominal cavity (tubal abortion)
30
What is eclampsia/pre-eclampsia?
-systemic syndrome of pregnant women: -WIdespread maternal endothelial dysfunction -Symptoms: HTN, edema, proteinuria (pre); Convulsions (eclampsia) Also, can develop hypercoagulability, acute renal failure, and pulmonary edema -Remember HELLP syndrome (last week) Pathogenesis is not well understood, but linked to three specific changes: -abnormal placental vasculature -endothelial dysfunction (imbalance of anti/angiogenic factors) -Defective vascular development in the placenta secondary to hypoxia -Coagulation abnormalities -reduced endothelial production of antithrombotic factors **proteinuria separates eclampsia from other diseases
31
Describe some changes in placental Vasculature
-during implantation and placental development, the spiral arteries of the secretory phase endometrium will be modified to provide blood to the placenta -Fetal cells invade the decidual plate and destroy the excess smooth muscle -Vessels change from the small lumen, high resistance to the large lumen, low resistance Remodeling does not occur in pre-eclampsia, resulting in placental ischemia and maternal HTN
32
Describe placental vessel damage
-may develop atherosis -lipid deposits in decidual vessel intima Hemorrhages may be visible in the liver, brain, heart, anterior pituitary -Kidney will have excess fibrin in glomeruli and thrombi in the cortex that may be associated with cortical necrosis
33
What is Mastitis?
-acute bacterial infection -Typically ocurrs during during first month of breast feeding -During breastfeeding, cracks and fissures may develop in the nipples -Allows access to bacteria like S. aureus or Streptococci Symptoms: fever, painful swelling, and edema Tissue changes : erythema,abscesses (S.aureus or strep) Starts in ducts but may spread to entire breast Usually treated with antibiotics and milk expression
34
What is the function of the prostate?
-releases product into the urethra -slightly alkaline fluid -contains an enzyme that maintains seminal fluid as liquid Prostate disease -surrounds the urethra, so inflammation or hypertrophy impacts urethral function -symptoms of difficulty urinating (starting, volume, incomplete voiding, pain)
35
What is prostatis?
bacterial (acute or chronic), abacterial (chronic) or granulomatous Acute bacterial -causative agents that cause cystitis -access to the prostate is through urinary reflux, surgery, or lymphatics/blood from a distant site Symptoms: fever, chills, dysuria Exam: prostate will be enlarged and tender Dx: urine culture and Sx/Exam Chronic Bacterial -causative agents as above -maybe asymptomatic; not necessarily preceded by acute infection -Sx: low back pain, dysuria, perineal/suprapubic discomfort -Hx: recurrent urinary tract infections (antibiotics do not penetrate prostate well) Dx: leukocytes in prostatic secretions: positive bacterial cultures Chronic Abacterial -a most common form of prostatitis -as chronic bacterial but bacterial cultures are negative -prostatic secretion will still have leukocytes -no history of recurrent urinary tract infections Granulomatous -Specific (agent ID'd) or nonspecific -most common is due to cancer treatment -fungal seen is due in immunocompromised hosts -nonspecific is due to ruptured ducts and acini -These clinical syndromes, when found incidentally on biopsy-acute/chronic inflammation Histologically: acute may have small abscesses, areas of necrosis that may be quite large, or diffuse edema, congestion, and suppuration
36
What is Benign prostatic hypertrophy ?
Transition Zone (TZ) -mucosal glands empty directly into the urethra common location for hypertrophy Peripheral Zone (PZ) -main glands with long ducts -primary location for inflammation and cancer
37
What causes BPH?
-circulating testosterone is converted to DHT by 5-alpha reductase in the prostatic stroma -Excessive cell growth due to DHT -Treatment with reductase inhibitors slows the growth and relieves symptoms --Other treatments require the destruction of tissue -minimally invasive (lasers) -Surgical Histologically Hyperplastic glands on either side of the urethra Two layers of cells in glands: 1. Inner columnar 2. Outer basal, flattened
38
Describe BPH clinically
only clinically apparent in 10% Common Sx: hesitancy Urgency Nocturia Poor urinary stream -Chronic obstruction: increased risk of UTI -Acute Obstruction: may damage bladder or kidneys