The Menstrual Cycle Flashcards
What is menarche?
the age at which the period starts
What is Adrenarche?
the age at which one grows body hair
What is Thelarche
the age at which long bone start to grow
At what age does the decline of number of eggs start to become rapid in women?
37
What group of hormones increase in female puberty?
gonadotrophins
Which hormone is first released from the hypothalamus to start female puberty and what does it do?
Gonadotrophin releasing Hormone GnRH
this stimulates FSH and LH from the anterior pituitary.
It is released in pulses at 90 minute intervals not continuously
What does Follicle Stimulating Hormone do?
leads to the eventual deveolpment of the graffian follicle
increases the LH receptors
What is the Graffian Follicle in gynaecology?
The egg that goes on to ovulate
What does LH do?
Acts on thecal cells of the ovary
converts androgens to oestrogens by aromatisation
In which cells does the aromatisation of androgens to oestrogens occur?
Granulosa cells on the ovary
What happens on day 1 on the menstrual cycle?
menstruation
How long does menstruation last?
around 4 days
What are the two phases of the menstrual cycle?
Follicular phase
Luteal phase
What are the layers of the uterus?
endometrium
myometrium
perimetrium
What are the two layers of the endometrium
Superficial layer
Basal layer
