IVF is the process that you don't get a high probability of multiples. my wife and i spent a ton of time and money going through this unfortunately. with IVF you can choose how many embryos to transfer, and even choose the sex. i can't remember the name for the procedure with possible multiples, but if i remember correctly, they stimulate multiple eggs to drop, then follow through with the man batter to see how lucky you can get. our physician would stop the process if he felt there was an overstimulation of eggs and the chance at too many multiples.
i really hope this works out for jeremy.