Lecture 13: Male and Female Reproductive System (Exam 3) Flashcards
(39 cards)
WHat diseases are covered in this lecture?
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
Where does spermatogenesis begin?
testes
What is infertility?
inability to conceive within one year
-monthly probability 20%-25%
-infertility has not increased
-screening and treatment options have
What is infertility?
inability to conceive within one year
-monthly probability 20%-25%
-infertility has not increased
-screening and treatment options have
What are the causes of infertility?
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)
Describe ways of Female Infertility
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
What are the ovulatory causes?
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
What are Tubal/Uterine causes?
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
Other causes of infertility
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
Whare the three types of male infertility?
Pretesticular
-endocrine disorders
-drugs
Testicular
-trauma, infections
-environmental, developmental
Post-testicular
-Tubal obstruction
-Autoimmune
-Developmental
What are the factors spermatogenesis?
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
What are pretesticular causes
-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
What are testicular causes?
direct effect on testicular function
-most common cause of reduced male fertility is varicocele
Varicocele: abnormally dilated scrotal veins
-the scrotal temperature is increased
What can cause testicular damage?
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
What is testicular torsion?
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
What are other testicular causes?
-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
What is Cryptorchidism?
-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
What are post-testicular causes?
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
What are specific sexually transmitted infections?
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)
What is Gonorrhea?
Infection with Neisseria Gonorrhoeae
-Males; causes urethritis
Females: often asymptomatic; may lead to pelvic inflammatory disease and infertility
in newborns, can causes blindness
What is Syphilis?
-infection with treponema pallidum (spirochete)
-can cross the placenta (congenital)
What is Lymphopathia Venerea?
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
What is Herpes simplex virus infection?
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
What are disorders of female reproduction involving disruption of menstruation?
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)