its vertually impossible first of all herms are sterile secondly cartmans mom has reportatly and been amited to have slept with most south park including the women one of them would have known log before this that cartmans mom was a HE/SHE. Plus as a SP commuinty member im sure the hospital would have known as well. lastly cartmans mother was in crackwhore magaizine the fact she had both sets of genitalia would have been shown then and advertised.
this was just a lame decision on the producers part. just so nobody could guess who the father was. It should have been any male or male like charactor in SP hell even the aliens would have been better this is a insult.
plus now they are just gonna say whos cartmans mother? to which cartman jsut says who cares.
Im dissapointed and even bitter