Oocyte retrieval for in vitro fertilization from a donor by means of a follicle puncture cpt code?
primary follicle/oocyte
When ovulation occurs, the graafian follicle(s) rupture. The oocyte with surrounding cumulus cells (COC's) are expelled into the infundibulum and transported to the site of fertilization. Before and during the rupture of the graafian follicle, blood vessels will rupture too, which causes hemorrhaging. So the structure that is left behind after the oocyte is expelled, is called a corpus hemorrhagicum.
follicle cells
graafian follicle
A primary follicle consists of a primary oocyte surrounded by a single layer of enlarged cuboidal epithelium. Recall that previously, there was a primary oocyte in a primordial follicle surrounded by a thinner single layer of squamous follicular cells.
in the Vesicular (Graafian) follicle
corona radiata
it is in the first stage
a surge in the level of the luteinizing (LH) hormone.
The egg (oocyte) develops within a follicle in the ovary. This follicle ( derived from the Latin word for nest) is a thin-walled structure containing fluid, with the egg attached to the wall. Usually, only one follicle develops per month. This follicular growth can be monitored by vaginal ultrasound scanning.
secondary follicle
LH Leutenizing hormone- it stimulates the release of the oocyte into the fallopian tube, i.e. ovulation. [Do not confuse with FSH- follicle stimulating hormone, which stimulates the growth/maturation of the follicle containing the oocyte IN the Ovary.]