Anormal metabolic process, the body utilize stored fat when other sources of energy are lacking.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.