I agree your daughter should be fine. I had a baby a year and a half ago. Had a relapse 6 months after the birth but just severe fatigue and stuttering, both passed after a while. I only realised when I relapsed that my vitamin D was at insufficient levels....might be a good idea your daughter get her vitamin D levels tested soon after the baby's birth and supplement if needs be, might help minimise or avoid a relapse. Best of luck.
RR-MS dx 1998 and Coeliac dx 2003
Copaxone, Cymbalta. EPO, Fish Oils, Vitamin D3 2000 IU daily, Cal/Mag/Zinc, Multivitamin/mineral, Co-Enzyme Q10, Probiotics, Milk Thistle.