Menstrual Cycle Flashcards
what is menstrual cycle
changes in a woman’s reproductive system that takes about 28 days.
When does menstrual cycle end
Menopause(50 years old)
Fertilisation
when sperm and egg cell meet
Where are FSH and LH released from
Pituitary gland
How are the release of FSH and LH controlled
Controlled by concentration of oestrogen
Days 1-5
menstruation
Uterus lining breaks down
Days 11
Menstruation ends
uterus lining begins to thicken again
Days 13-15
ovulation
ovary releases egg
Days 16+
Fertilisation (most likely leading to pregnancy) days 18-20
Uterus lining continues to thicken
How is menstruation triggered
Falling levels of oestrogen and progesterone
How does hormonal contraception helps with preventing pregnancy
Raising hormone concentrations prevents falling concentrations at end of menstrual cycle
Assisted reproductive technology (ART)
uses hormones and other techniques to increase the chance of pregnancy
Clomifene therapy
Clomifene is drug that helps release FSH and LH
useful for women who rarely release egg cells during menstrual cycle
In vitro fertilisation IVR
Overcomes problems such as blocked oviducts
helps if man produces few sperm cells