Gonorrhea is transmitted by 1. contact with blood and body fluids 2. coughing or sneezing (droplet or aerosol) 3. mucous membranes coming into contact with each other 4. skin to skin contact

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.