Beta #2
Often clinics will follow beta values to ensure they're rising appropriately. On average in early pregnancy betas double every 48 hours. Thus, a second beta 2 days later gives the RE an early indication of any issues and viability.
Today's beta was 206. That's more than double from the 76 two days ago. I'm back to my initial thought that we have one healthy implanter and the possibility if a vanishing twin. Its possible there are two in there but the initial beta is on the low side of normal for a singleton so if two implanted, its just more fear to add to my already overstressed mind.
Just to give an idea of our previous betas and result:
IVF #2 - twin boys (more than doubled - late loss not related to health of embyro/implantation)
Beta #1 - 92
Beta #2 - 204
IVF #3 - unhealthy singleton (didn't quite double)
Beta #1 - 125
Beta #2 - 227
IVF #4 - ?? (more than doubled)
Beta #1 - 76
Beta #2 - 206
Interesting comparison eh?
Now we wait. Typically our clinic does a viablity ultrasound at 7 weeks but with our pregnancy history, we're opting to wait it out one more week and do an ultrasound at 8 weeks. It makes more sense to me since the 7 week mark is Christmas eve and I don't want bad news before Christmas. Bad news before New Years is ok (reason to drink up) but not before Christmas.
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