Describe how passive immunity to a disease is obtained

 when maternal antibodies are transferred to the fetus through the placenta, and it can also be induced artificially, when high levels of antibodies specific to a pathogen or toxin obtained from humans, horses, or other animals 

1.controls blood flow2.controls oxygen flow3.carries oxygen rich blood to veins

There are a couple of answers.you could have an infection, a sti, std, or other problematic health issues.i would recommend going to the doctors, if not, take a shower and wash down there, then wait a couple of days, and if it’s still there, then is when you should go to the nearest or trusted gynecologist of your choice.