No it s the opposite. It helps pushing the sperms further up. It's also something you should always avoid since you can mess up the natural flora of the vagina which makes it easier to get infections.
no it can't prevent pregnancy
Vitamins don't prevent pregnancy.
BV won't prevent pregnancy.
NO ! ONLY contraception or abstinence can prevent pregnancy !
No. Cytotec can be used for abortion but not to prevent pregnancy.
Starch as in pasta, potatoes etc? That does not prevent pregnancy.
Yaz is a birth control pill. It is intended to prevent pregnancy.
You can write about how to prevent teen pregnancy. Or what causes teen pregnancy. Talking about the right form of education to prevent teen pregnancy will work as well.
Advil don't prevent pregnancy no matter how many you take.
No, weed does not prevent pregnancy or interfere with contraception methods.
No it does not.
no