Thanks just one update
Blastocyst transfer on 6-Feb-11 and Beta test done on 15-Feb-11 (9 days after transfer)
It is low but at least it's doubling. There are women who start out low and go on to have healthy pregnancies. Unfortunately this is an exception, not the rule. This has happened to me twice in the past year. There is nothing you can do but wait : (
Good luck; I hope it works out.