I agree with EVERYONE else, any chance of the baby surviving is going to be with leaving it in place, taking it out when it really doesn't need to be taken out is going to kill the baby and hurt your sister. I would be leaving it in, coming home and getting proper treatment.

Termination doesnt give the baby a fighting chance, leaving it does. A decent Ob will do everything in their power to make sure the baby is ok. A GP cannot make a specialist recommendation, They do not have the training to make an educated recommendation and therefore should be telling her to go home and see a specialist.