While there might be arguably more than a single affect, I think the largest and most significant effect is impregnation. Sperm fertalizes the female egg and causes pregnancy.
Boy sperm are generally faster than girl sperm.
Girl sperm swim faster than boy sperm. If the man ejaculated when he wasn't very far inside of you, chances are you'd have a girl. The hormones/birth control pills wouldn't have any affect on the sex of the baby because the man's sperm determines the sex.
No, a girl cant get pregnant from sperm on thigh........
No. A girl gets pregnant from sperm in her vagina.
Girls do not produce sperm.
No, girls don't produce sperm.
No, a girl can not get pregnant without the presence of sperm.
Yes, it is possible for a girl to get pregnant from dry sperm on underwear if the sperm comes into contact with the vagina.
No, it has no affect at all.
Sperm :) xD
No. Viagra does not affect sperm count.
No, blank sperm cells cannot get a girl pregnant. Sperm cells need to be healthy and fully developed in order to fertilize an egg and result in pregnancy. Blank sperm cells typically lack genetic material and are unable to perform fertilization.