Most people are familiar with the birth control pill, but there are also other birth control options like implants and intrauterine devices. There is also a birth control shot. The shot uses Depo-Provera which is the brand name for medroxyprogesterone. It must be given once every three months. It prevents pregnancy by preventing ovulation. It also causes your cervical mucus to thicken which helps keep sperm from reaching an egg. Here are some things you might need to know about this shot if you're considering using it for birth control.      1. According to Planned Parenthood, the birth control shot is over 99 percent effective when it's used correctly, but in reality, it's closer to 94 percent because women often forget to get the shot. So that means about 6 out of every 100 people using the shot will get pregnant every year. So if you're thinking about going on the shot, you need to remember to make appointments with your doctor regularly to make sure you don't miss a shot. It's a good…