when i find something i like (which works) i dont really care to switch. no reason to. so i stick with pregnyl.
in reality they are all the same just make sure its legit. to do so, you need to reconstitute the HCG and drop a few drops on a home pregnancy test (yes, a female pregnancy test) because natural HCG is produced by pregnant women.
funny story, i got some HCG and got some pregnancy test to check if its legit and all of a sudden my girlfriend knocks on my door. i quickly put it in my closet and forgot about it. a few days later she finds 3 POSITIVE home pregnancy tests...
needless to say, gill had a lot of `splaning to do