A: Aggregate demand, or AD, is defined as the total amount of goods and services consumers are willing to purchase in a given economy and during a given time period. Sometimes aggregate demand changes in a way that alters its relationship with aggregate supply, or AS; this is called a shift..
The birth control shot, Depo-Provera, is a hormonal injection that prevents unplanned pregnancy for three months at a time. The hormone in this shot is progestin. The birth control shot works similarly to the birth control pill. It prevents ovulation and increases the mucus buildup around the opening of the cervix. According to Planned Parenthood, when you receive it as directed, the shot is 99 percent effective.
Depo-Provera is a contraceptive method for women. Itâs made of a hormone similar to progesterone. It's a shot that a doctor gives you in the arm or buttocks. Each shot works for up to 12 to 14 weeks, but you must get the injection once every 12 weeks to get its full protection.epo-Provera starts to work as birth control immediately after the first shot, if you get it within the first 5 days of your menstrual period. Itâs 99% effective in preventing pregnancy.