Question regarding bf's daughter

putmankr1

Hi- My bf and I are expecting are first child together.  I have an 8 year old daughter and he has a 14 and 11 year old son and a 9 year old daughter.  His daughter was born with severe disorders which impact her daily. His ex-wife had more kids with her current husband and one of their daughters has the same disorder as my bf's daughter and it is a genetic disorder from their mom.  Is this something I should bring up with my ob at my next appointment? Any suggestions welcomed :-)   I'm 13 weeks today due January 22, 2013.