STD's usually don't prevent pregnancy. Are you trying or are just wanting to know?
There is no known percentage for definate. if you use a condom then there is roughly a 5% change of getting pregnant, where as if you use no protection or contraception, the risk is considerably high. if you dont want to become pregnant you may want to consider birth control, and also without a condom you run the risk or catching an STI or STD.
You can get a STD and pregnant at the same time.
no, They cant.
Make sure she is on birth control, but this does not protect either of you against STD's.
Yes there is a chance of getting pregnant without having periods
Well, I can assure you that you will not become pregnant again but if your concern is based upon spreading STD's then yes you do need to wear a condom.
has there been any known cases of a women getting pregnant without a uterus
Yes. Too much hormone production can cause lactating of the breasts without being pregnant.
Uhh impossible!! And btdubs, you shouldn't be getting pregnant if you don't even have your period yet.
No, you can not become pregnant but can catch an STD. So best to be cautious.
No, but you can get a STD or infection.