Biology
4 hormones that are present during the cycle
Follicile stimulating hormone (FSH)
Oestrogen
Luteinising hormone (LH)
Progestrone
Day 1-4
no fertilisation and impantation --> uterus lining sheds
egg is released with it
Days 4-14
Uterus lining thickens
blood vessels grow
preparation for implantation of the egg
Day 14
egg is released
follicle to oviduct (ovulation)
Days 14-28
Uterus lining maintained
implantation occurs
FSH
Secreted by piturity gland
transported by blood to overies
triggers the development of the follicle in the overies
releases oestrogen
Oestrogen
Secreted by overies
repairs/thickens lining in uterus
inhabits secreation of FSH
Stimulatates secreation of LH
LH
Secreted in the pituitary gland
transported in the blood
Surge in LH triggers ovulation
Srilmunates follicle remains
Progestrone
Secretes by pituitary gland
Stimulates the growth in blood vessels
Inhabits the release of FSH and LH
No implantation= decrease of progestrone levels
uterus lining sheds
Corpus luteum
Tempoary endocine structure
Mass of cells that release progestrone