Unit 4- Female Reproductive Flashcards
XY
Testosterone and anti Mullerian hormone cause the Wolffian duct to persist and the gonads become testes
XX
Mullerian duct persists and gonads become ovaries
Disorders of Sexual Development
Abnormalities of sex chromosome or hermaphroditism resulting in abnormal appearance of external genitalia
Partial Masculinization
Exposure to testosterone and anti mullerian hormone released from ovotestes cause clitoromegaly and partial fusion of vulvar lips
True Hermaphroditism
Ovotestes, testosterone produced by Leydig cells and AMH by sertoli cells masculinizes mesonephric duct, paramesonephric duct, tubules, and external genitalia
Freemartinism
Male and female twins, anastomoses between vascular systems allows male hormones to masculinize and sterilize the female, occurs in bovine
Freemartin Organs
Hypoplasia of ovaries and uterus, ovotestes, failure to form uterine body, vesicular glands, uterus and vagina do not communicate, large clitoris, hair on vulva
Follicle Stimulating Hormone
Anterior pituitary initiates follicle growth
Luteinizing Hormone
Anterior pituitary stimulates follicle growth and rupture to form corpus luteum
Estrogen
Ovaries prepare uterus for pregnancy and cause secondary female characteristics
Progesterone
Corpus luteum and placenta maintain pregnancy
Prostaglandins
Cause corpus luteum and follicle rupture
Periovarian Cysts
Outside the ovary from embryonic structures, incidental, happens in bitch, mare, cat
Ovarian Cyst
Inside the ovary, follicle origin can cause disease, rete ovarii is an embryonic structire
Fimbrial Cyst
Paramesonephric duct cyst on the fimbriae of uterine tube, common in mares, incidental
Cystic Rete Ovarii
At the hilus of the ovary where the Wolffian duct was, common in dog, cat, and guinea pig
Epithelial Inclusion Cyst
Surface epithelium is trapped in ovarian stroma at ovulation fossa, common in mare, can increase in size and cause infertility
Anovulatory Follicular Cyst
Graffian follicle larger than normal at ovulation
Causes of failed ovulation
Uterine infection, genetics, absence or missing pre-ovulatory surge of LH
Signs of Hyperestrogenism
Bone marrow suppression, uterine changes
Size of Ovarian Cysts
greater than 2.5cm in cow, greater than 1cm in sow, sheep, and goat, greater than .75cm in bitch
Ovarian Remnant Syndrome
Ovarian tissue remains after spay, produces estrogen and triggers signs of heat
Equine Ovarian Varicosity
Dilation of the veins leads to thrombosis and infarction in old mares, mostly incidental
Oophoritis
Rare inflammation of ovary, can be ascending infection from uterus
Granulosa Cell Tumor
Theca cell, most common in horse, unilateral cystic mass producing estrogen, inhibin, testosterone, and AMH, atrophy of contralateral ovary
Granulosa Tumor Clinical Signs
Nymphomania, stallion behavior
Dysgerminoma
Germ cells, comparable to seminoma, unilateral, solid, and soft, some metastasize in dogs, more aggressive in horse
Teratoma
2 germ cell layer differentiation, benign, contain other body structures
Ovarian Carcinoma
Common in dogs and chicken, surface epithelium, most commonly bilateral, cauliflower appearance from papillary structures on surface, leads to peritoneal implantation and ascites
Hydrosalpinx
Blockage from defect or inflammation leads to fluid accumulation
Salpingitis
Secondary to uterine disease or traumatic from manipulation of ovary
Acute Causes of Salpingitis
T. pyogenes or Staph/Strep causing pyosalpinx
Chronic Causes of Salpingitis
Mycoplasma and ureaplasma
Segmental Aplasia of Uterus
Developmental disorder, part of uterus does not develop
Endometritis
Inflammation of endometrium postcoitus or postpartum, mares, ascending infection if cervix is open
Metritis
Inflammation invading myometrium
Evaluating Fertility in Mare
Glandular nesting or loss, periglandular and interstitial fibrosis, and inflammation
Endometrial Biopsy in Mare Grading
I highest chance of carrying foal, III lowest