Menstrual Cycle Flashcards
A surge in which hormone is required for ovulation?
Luteinising hormone
What effect does progesterone have on the endometrium, and what is this process called?
Causes endometrium to become thick and spongy - pseudo-decidualisation
How do periods stop once a woman becomes pregnant?
hCG causes the corpus luteum to last and continue producing progesterone
What is the corpus albicans?
Regressed corpus luteum
What are the phases of the ovarian cycle?
Follicular phase and luteal phase
What are the phases of the uterine cycle?
Menses, proliferative phase and secretory phase
Which is the predominant hormone during the luteal/secretory phase?
Progesterone
Which hormone surges just after ovulation?
Inhibin B
What is the role of gonadotrophin releasing hormone?
Stimulate LH and FSH secretion from the anterior pituitary
What is the role of FSH?
Stimulate follicular recruitment and development
What is the role of LH?
Maintain dominant follicle, induce follicular maturation and ovulation
Where is LH produced?
Anterior pituitary
Where is FSH produced?
Anterior pituitary
What is the role of oestradiol?
Supports female secondary sexual characteristics and reproductive organs
Negative feedback control of LH and GnRH (except late follicular phase - positive control of LH surge)
Stimulates proliferative endometrium
Negative control of FSH
Where is oestradiol produced?
Granulosa cells
