Subject: Can a unborn childs DNA be changed by having intercourse w/a different man

Ok so i actually believe i no the answer to my question but i need proof.  My 
little brother is dating a girl who just found out she's pregnant by someone 
else & her & her family have my brother beleiving that if he has intercourse 
with her throughout the rest of her pregnancy it will change the babys DNA & 
make him the biological father.  In my opinion this not an intelligant 
question to ask but no matter what i say none of them belive me so i would 
really appreciate a scientists opinion so i can print it & showthem cause my 
brother is only 15 and he is not ready to be or even think he is a father.  
THANK YOU IN Advance      Keri Dishman

Re: Can a unborn childs DNA be changed by having intercourse w/a different man