What does thus mean about the most effective way to lower birthrates

The birth rate (technically, births/population rate) is the total number of live births per 1,000 in a population in a year or period. lower birth rate will reduce the rate at which a population grows. ... Consider a population that increases 5% every year.

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.

air enters through the nose, moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi andbronchioles till the alveoli.