More Details on Pregnancy and MS
Unfortunately, between 20 percent and 40 percent of women with multiple sclerosis do have a relapse in the three months following delivery. However, there is no evidence that pregnancy and childbirth affect the overall course of multiple sclerosis one way or the other.
Also, while multiple sclerosis is not in itself a reason to avoid pregnancy, and poses no significant risks to the fetus, physical limitations can make child care more difficult. So it is important that people with multiple sclerosis who are planning families discuss these issues with both their partner and physician.