If you are saying 12-13 days past retrieval you are at the point where you would first start seeing a line and it wouldn't be late implantation, at all. Typically the embryos are put back at 3 or 5 days past retrieval and you would see the 2nd line at 7-8 days post transfer. This would be 10-13 days past retrieval. The hgc should be well out of your system by now, so it looks like you have a BFP!! Congratulations and keep us posted!
Me: 34 Ectopic 5x - both tubes removed
DH: 27 MI - Low everything
IVF June/July 2010 - BFN
FET August 2010 - BFN
IVF #2 November 2010 - BFN
IVF # 3 - November 2011 - BFN
FET - Feb 2012
i dont think you can predict misscariage based on when teh line shoes up. i wouldnt worry. wait till your beta and see how it doubles and grows. that's the only way to tell. congrats on getting a BFP!
slntbob- i am so sorry. maybe it can still work out. i know of two women on this board that had babies from betas of 20 or 30.
i also just had 2 ivf cycles that started with low betas. and in one case it was an ectopic. and in another case it was a chemical. sorry to bring bad news. but maybe yours will be fast rising and will result in a h/b and a baby. it does happen sometimes.
i know - its really hard. i also have 1 child from ivf #2 and am fighting the "ivf fight" to give him a sibling. getting ready for my #6 cycle and so far i've had 1 ectopic, 1 bfn and 1 chemical following my DS. never thought it would be this hard to get pregnant again. oh well.... i think i'll try 2 more times before calling it quits alltogether.
good luck!!!
ME 40, DH, 43
#1 IVF BFN
#2 FET DS born
#3 IVF ectopic
#4 FET BFN
#5 FET Chemical
#6 IVF, BFP at 8dpo, beta 215, started out with twins, one vanished at 6 weeks, EDD 9/4/12