Thanks Missmoon and curious.
Dr Loh said, sometimes due to bad feotus/embryo, the body will dispel it. Usually there will be no heartbeat. So there will be miscarriage. Or sometimes, due to implantation and deeper embedding of the sac, some tiny blood vessel will have abrasion and some blood though embryo is fine. But must not further strain the womb.
First one is 2.5 yo. You know something...last time before I start the program, I asked him whether he wants didi or meimei..and he said meimei..after my ET, I asked him a few times again, he always said didi and meimei. So I thought maybe he just repeated after me as he is still not talking very much yet...so I specifically tell him, no...you can only choose 1..and guess what he said "2!"...And he give the same answer the few times that I asked him...sometimes kids can be quite "chun". I just hope didi and meimei will stay strong and come out to play with gorgor.