What are hormones?
Hormones are chemical messengers which are carried by the blood around the body.
The hormones include; Insulin, Glucagon, Adrenaline, Testosterone, FSH, LH, Oestrogen, Progesterone, HCG and Oxytocin.
Which gland releases FSH?
The pituitary gland
What is the role of FSH?
FSH is carried in the blood stream from the pituitary gland down to the ovary
Causes the egg to mature in the ovaries
It laso triggers the ovaries to make oestrogen
What is the role of oestrogen?
Causes the lining of the uterus to become thicker
It also stops the pituitary gland from producing any more FSH
What happens when the pituitary gland stops producing LSH?
It starts to produce LH
LH causes ovulation, which is when the egg is released into the uterus
What happens when the mature egg is released from the ovaries?
The ovary now produces progesterone
What is the role of progesterone?
It maintains the thick lining of the uterus, allowing the fertilised egg to implant into the uterus lining
Stops the pituitary gland from releasing FSH and LH
Explain the levels of hormones throughout the menstrual cycle?
As FSH rises, ovaries release oestrogen
Oestrogen triggers release of LH
LH triggers ovulation
Ovulation causes progesterone levels to rise
What happens from days 1-7 in the menstrual cycle?
The lining of the uterus breaks down and is lost through the vagina, also known as the menstrual bleed.
What happens from day 8-14 of the menstrual cycle?
The lining of the uterus is being repaired and built up again
What happens during ovulation?
The egg is released into the oviduct and here it can be fertilised by the sperm cell
What happens from day 15-28 of the menstrual cycle?
The lining of the uterus is spongy and thick where a fertilised egg can stick
