No, sperm are required for pregnancy.
No, sperm doesn't cause early miscarriage.
Not unless you can transfer sperm from your mouth down into her eggs.
Not normally, no. It could only cause pregnancy if there was sperm on his fingers. However, even if he did it would be unlikely to cause pregnancy. Still, it is important to make sure there is no sperm on his fingers if he is going to touch her.
It is possible for those sperm to find their way into the uterus and cause pregnancy.
No. For pregnancy to occur there needs to be sperm.
No.
This can be consdiered a form of birth control. Sperm in the mouth does not cause pregnancy. Sperm elsewhere can. Keep the sperm where it will do the least harm.
No. If a woman is infertile, sperm will have no effect on her. Infertile means she cannot get pregnant.
Pregnancy, under the right conditions.
No. It does not affect your pregnancy test. You do pregnancy test on your urine.
No. They can cause a girl to show positive in a pregnancy test, though.