Reply #19: In some countries, IVF transfers are limited

[Gormy Cuss]

Britain limits it to two per cycle, for example. There was a Belgian study which concluded that two embryo transfers were the optimal level for reducing the number of multiples without restricting the success rate by too much (paraphrasing, but article here: http://humrep.oxfordjournals.org/cgi/content/full/14/1/83 )

It is well within the bounds of medical ethicism to restrict procedures that put the patient or patients at an intolerable risk for greater harm (can't sell both your kidneys, for example.)