beta doubling time

My 2nd blood test result is 611. My doubling time is 34hours. My progesterone level is 550 or 17.5. My beta doubling time is faster than the average doubling time.
I feel very consoled and assured now.

Here is a link that helps calculate how many heartbeats has your child taken so far.
From the link, my 20 days old embryo's heart will start beating in 2 days time.
http://www.ehd.org/pregnancy-heartbeat-calculator.php