REPRODUCTION SEM2 Flashcards
What happens to the endometrium when follicles grow
Endometrium thickens up (proliferation endometrium) at around 9mm
What structure forms when the follicle ovulates
Corpus luteum forms
What occurs to the endometrium during the proliferative phase
The endometrium thickens
After ovulation, what happens at the secretory phase
Endometrium stops growing to secrete garlands to nourish pregnancy
What is the role of FSH and its relationship with oestrogen
FSH stimulates follicle growth => FSH decreases when oestrogen increases due to -ive feedback
What does a high level of oestrogen result in
Surge in LH which causes ovulation
Does a follicle require less or more FSH as it grows
Follicles require less FSH as they get bigger
Role of progesterone in endometrium growth
Stops the growth of the endometrium and prepares it for pregnancy - if no pregnancy occurs endometrium destabilises and causes period
What hormone is produced once embryo attatches to lining of the uterus
hCG
Role of hCG
Acts on corpus luteum to maintain progesterone levels
3 tests involved in possible fertility issues
1)Ovary not behaving in normal manner - not releasing eggs regularly
2) problem with tubes - e.g blocked tubes
3)sperm cause - due to count or function
Condition where tubes at the end fill up with fluid
Hydrosalpinges
What is the result of hydrosalpinges
Fluid will drip into the uterus and reduce the chances of pregnancy and IVF
What is the goal of IVF
To grow more eggs/multiply egg count
What methods can be used to block the LH surge when undergoing IVF
1)GnRH agonist - large dose to down regulate its receptors by saturating them
2)GnRH antagonist
