If people decide to have sex.

Birth Control Patch Birth Control Pill Birth Control Ring Birth Control Shot Cervical Cap Condom Diaphragm Emergency Contraception Implantable Contraception IUD Fertility Awareness Spermicide Withdrawal.. About Birth Control One of the toughest decisions that a lot of teens encounter is whether to have sex. If people decide to have sex, this means they must also take responsibility to safeguard themselves from unplanned being pregnant and sexually transmitted illnesses . Most teens who get pregnant in the United States didn’t anticipate it.In the radiography group, the positive predictive value was 70.2 percent for a positive screening result that led to a biopsy procedure but only 5.7 percent for positive screening results overall . The positive predictive worth for pulmonary nodules was 5.8 percent ; the value elevated from 1.0 percent to 39.3 percent as the size of the nodule elevated from four to six 6 mm to more than 30 mm. The positive predictive value for noncalcified hilar or mediastinal adenopathy was 9.3 percent .