Its always scary when you talk surgery with a yorkie, but my sisters dog(chi) has to go the vet every other week, with having her glands clean, and the vet has tried his best to get her to do surgery because of it busting...I would seriously consider it..but it is your baby & I know how you feel, I am scared of Lexie getting spayed...Good Luck with Baby and we will be saying prayers for her and you too...