teenage pregnancy

Teenage Pregnancy? Why do teenagers get so qiuck pregnant but when they were younger they make alot of promises but they can't keep to their promises.But I think most of the reasons most of the girls come home pregnant is becuase there parents keep them to tight,don't let them go out with there friends.But i think sometimes you can't blame the children alone,sometimes it's the parents as well.The parents maybe have a drinking problem or a drug problem and the children think they can take atvantage becuase there parents are almost never around to talk to when they are feeling down or have problems.Sometimes the parents don't even talk to there children bout sex.Sometimes the children are abused and they run away from home and think there parents don't care for them.