hi all, sorry if i sound ignorant but i am very new to all this my 3 month old son has hypoplastic left heart syndrome baically only half his heart works, this was not picked up on any scans etc so a real shock which to be honest is still very raw!. i am now worrying about my 22 month old son as he is a little slow in speech but since getting rid of his dummy is coming on very well, the main thing is that he has always loved to build many towers of bricks and does line things up like placemats or toys and he also does a hand flapping thing, it kind of looks like he is doing the macaraner dance(spelling!) he did stop doing this for a while but has started doing it again. my worry is that because my second son has such a serious birth defect could there be any genetic link between that and my first son, or are these things normal for a 22 month old? i should add that my son has his 2nd operation planned for 2 weeks time so my paranoid brain may be working on overdrive and I dare not mention it to anyone as we have enough on our plates at the moment! would be so grateful of anyones experiences/opinions. thank you.