Are Vovoron Injections For Migraine Safe During Pregnancy?

My daughter in law is on her family way and she is suffering of Migraine pain.Doctor has given Vovern injection s in the last two mobnths.She is having 2 months old foetus.I request you to advise me whether Vovoron injections are harmful.What is the adverse affect of Vovrone injection on two month old foetus.Should i advise my son to think for abortion ?Doctor says no treatment for Migraine may be given at this stage.She is reported to be suffering of Migrane pain for the last $-5 years.