esj--Just this week I received the winter 2010 issue of Momentum, the magazine from the National MS Society. Its cover story, "MS and Starting a Family," deals with many of your questions. I encourage you to find a copy (perhaps from your local NMSS office); their website,
http://www.nationalmssociety.org/multim ... index.aspx does not yet have the winter issue posted.
Although I do not agree with the premise that MS is an autoimmune disease (I think that in my case excess insulin initiates the MS cascade), and I found no improvement when taking the disease-modifying drugs, the article makes good points:
Page 26, "… none of the disease-modifying drugs, including Avonex, Betaseron, Rebif, Tysabri, and Copaxone, are approved for use during pregnancy. Though these drugs haven't been proven to increase birth defects or affect development in unborn babies, most doctors tell their patients to stop – not only during pregnancy but for several months before trying to conceive. Indeed, some animal studies have found a higher rate of miscarriage with the interferon-based MS drugs."
Page 27, "During pregnancy, the mother's body releases estrogen and other hormones that suppress her immune response so she doesn't reject the baby. This natural immunosuppressant effect puts MS into a very quiet state, especially during the third trimester."
esj-- Perhaps your current exacerbation would naturally improve in your third trimester.
Page 32, "The breastfeeding conundrum:… just as in pregnancy, doctors usually recommend staying off disease-modifying drugs while you breastfeed. (You can take steroids while nursing, however.) If you decide to stay off your med and breastfeed, there is some evidence that nursing might protect you. 'The protection afforded through breastfeeding can be as beneficial, or more so, than the immune-suppressant drugs,' said Elsie E Gulick, PhD, RN, FAAN, professor emeritus at the Rutgers University College of Nursing, Newark, N.J.
When she studied new mothers with MS, Dr. Gulick discovered that women who did not breastfeed were three times more likely to have relapses and mothers who breastfed during the first three months of their baby's life. In other research, 87% of women who didn't breastfeed had a relapse in the first two months after delivery, compared with only 36% of women who breastfed exclusively."
My best to you. By the way, I encourage you to line up all the help you can from family and friends, or even hire paid help, if you can afford it, when you and baby come home – not just in the first few weeks, but for up to a year. Help with childcare, housekeeping, meal preparation, and even emotional support are SO important!