32/33 Female Repro Flashcards
This layer of the ovary has follicles and is highly cellularized. May also contain a corpus luteum, corpus albicans and atretic follicles
CORTEX
these cells arise in yolk sacs, migrate to ovary in embryo
Primordial Germ cells
After primordial germ cells, this forms = 2N DNA, it multiples in ovary and becomes an oocyte
OOGONIA
4n DNA and becomes arrested in PROPHASE 1, stays in ovary until puberty
Primary Oocytes
2N DNA, expelled when ovulated, arrested in metaphase 2
if fertilized it will undergo metaphase 2
Secondary Oocyte
1N DNA, Haploid
Mature Ovum
non viable daughter cells, contains DNA with minimal cytoplasm, they DIE.
All the cytoplasm goes to one big FAT OVUM
POLAR BODIES
Primary Oocyte + Surrounding Follicles Cells =
PRIMORDIAL Follicle
Only follicle to exist in ovary until puberty made up of simple squamous cells
PRIMORDIAL follicle
These follicles have a single layer of cuboidal cells
Primary Follicle
multilayered follicle cells –> granulosum cells
Zona Pellucida formed – important role in fertilization
Theca layers
Growing/Multilamella Follicle
These follicles contain fluid filled spaces = antrum in the granulosum layer
Antral/Secondary EARLY follicle
fluid filled spaces become ONE ANTRUM
Secondary LATE follicle
enormous, undergoes first meiotic division and secondary oocyte gets expelled at ovulation
Graafian Follicle
remnants of ruptured graafian follicle collapse and become converted into a temporary endocrine organ
- secretes progesterone/estrogen
round euchromatic nuuclie and acidophilic vaculoated cytoplasm
CORPUS LUTEUM
When corpus LUTEUM degenerates due to not being implanted it gets replaced by a connective tissue scar
CORPUS ALBICANS
only one follicle reaches GRAAFIAN stage, while the rest become degenerate
ATRETIC FOLLICLES
ovaries are enlarged 2X with many follicular cysts, The tunica albuginea is thickened and the theca = hyperplastic
POLYCYSTIC OVARIAN SYNDROME
Most malignant ovarian cancers are derived from
SURFACE GERMINAL EPITHELIUM
Most common ovarian neoplasm
HIGH GRADE SEROUS NEOPLASM