The vertical axis is used to represent one factor, such as price, while the horizontal axis is used to represent a second factor, such as quantity. The curve of market demand is negatively sloped from right to left, representing the law of demand, while the aggregate curve represents additional factors.
There also were 771 incidents of side effects assessed to be likely or definitely related to the use of the birth control shot, the findings showed. The most common were acne, increased libido, muscle pain, and mood and emotional disorders.
How Well Does the Birth Control Shot Work? The birth control shot is a very effective method of birth control. Over the course of a year, fewer than 3 out of 100 typical couples who use the birth control shot every 3 months will have an accidental pregnancy. The chance of getting pregnant increases if a girl waits longer than 3 months to receive her next shot.