I was 643 and two days later I was 1727 at 4 weeks prego...delivered my twins last month.
I agree as I am having twins and my first beta was 175 9day after transfer I think I would have been considered a month pregers
numbers do not indicate multiple pregnancies. i've heard of singleton pregnancies with higher levels than multiples pregnancies. the ONLY way to know if it's more than one baby is to have an u/s done.