I am a die-hard animal lover and it has simply never crossed my mind that my IVF meds might be animal unfriendly. TBH I do find that quite confronting, but would it stop me in my quest to have a baby? Sadly, no.
I would hazard a guess to say that many drugs are still being trialled on animals and as sad as that is, without those trials many humans would be suffering.
ETA: Wait....Do you mean tested on hamsters, or is actually made from hamsters? That's a bit unsavoury. I wonder if all the 'biggie' IVF drugs are from the same 'source?'