i know that my company allows you time off for appointments during your pregnancy and this would count as that. I would definitely check with HR. In UK im pretty sure they have to give you time off for antenatal appointments but double check.
I think u have to take it as a sick day or vacation. Def. Check with hr. Every company has different policies
My sick days are paid but think i may have used them, my work only give 6 days in a rolling year.
If your sick days are paid. It varies from place to place, so I'd call your Human Resources office and ask.