BayouBlonde, I saw the difference in what the guide and store descriptions said about the baby boost too, and it also confused me.

I used to get mulitple births every time I used the baby boost...They would eventually have twins or triplets if not on the first try. However since upgrade .05 I haven't had one multiple birth no matter how much or how little baby boost I use. It has to have something to do with a change in programming from the earlier versions to this one.