Just got the call from St. Mungo's a little while ago. . . . my second beta is 3649.
Because my two betas were four days apart, I had to use an online calculator to figure out the doubling time. It's just over 35 hours, which is good.
My P4 level was fine, too (31.8), so we're doing well.
Now just waiting for our first u/s on July 11 to see whether one or two of our embryos decided to stick around.
P.S. MM is getting brave. He actually suggested we buy something for "Future Baby M__" at the Gymb.or.ee 70% sale this weekend. (We got a very cute outfit with lions and monkeys.)