I found a few sites with mention of it.

http://www.aboutrsd.com/pregnancy-and-rsd.htm
http://www.rsdrx.com/rsdpuz4.0/puz_7.htm
http://www.rsdrx.com/rsdpuz4.0/puz_141.htm
http://www.rsdinfo.com/rsdandpregnancy.htm

google results list-
http://www.google.com/search?hl=en&q...=Google+Search