no
Unfortunately there is not a lot known at the time about how to prevent or even reduce your chance of having an ectopic pregnancy.
Yes, there is a chance. This chance is small though. Any amount of sperm/semen that is released from the male's penis that comes in contact with the female's vagina can have a chance of pregnancy. You are probably safe from being pregnant but it is not recommended if you are trying to prevent pregnancy.
no it can't prevent pregnancy
Yes, emotion does not prevent pregnancy. If sperm enters the vagina without any type of protection, there is always a chance of pregnancy.
Vitamins don't prevent pregnancy.
BV won't prevent pregnancy.
Lithium does NOT prevent pregnancy.
As long as you're menstruating, there's a chance of a natural pregnancy. If you're not menstruating, there's no chance of a natural pregnancy.
Once a woman has surgery to prevent pregnancy, she cannot get pregnant. However, depending on the procedure that is done, there may be a slight chance.
NO ! ONLY contraception or abstinence can prevent pregnancy !
Starch as in pasta, potatoes etc? That does not prevent pregnancy.
No. Cytotec can be used for abortion but not to prevent pregnancy.