Normally, I would say she doesn't have a case because even sterilization can fail and that's covered in the consent. But her doctor only tied one tube! She only has one ovary, but you still need to tie both tubes because either tube can pick up an egg from either ovary - it's not even that uncommon. So I would say that this doctor did not meet the standard of care at all. And sickle cell disease is pretty terrible to live with.