Hi SK, there is no research that I am aware of that shows that family members are more likely to get an auto immune disease because it runs in the family. I am one of 9 and as far as I know I am the only one effected. I'm 51 so if anyone is going to get it I would think they would have by now. Having said that I have heard of it happening. I read an article recently of a mother that has lupus and she is 60 now and her daughter had it and died when she was 20. There are also people in this group that have child that suffering from some type of auto immune disease as well. Though not nessesarily the same disease as mom.
As for your sister in law, if she is planning on having other children she may want to see a rheumy. There is no certain test that will show anything but there are things that can set off some bells and whistles. Otherwise unless she is feeling sick there really isn't a reason to see the rheumy since there is no cure. Only medicines to help keep symptoms in check.
I'm sorry I didn't see your post earlier. I'm sure others will be able to help you out.
Possible scleroderma. stage 4 COPD, sleep apnea, Osteoporosis,osteoarthritis
Prednisone,plaquanil400mg,azythromyacin,vicodin 4x5mg,Evista60mg, Effexor 150mg,Xanax 1.0 x3,Singular,nitro spray, provigil 200mg spirivia,aciphex,lasix ,pot.chlor.,B12 ,iNDEROL
Bear ye one another's burdens
Galatians 6:2 KJV