I am happy to say IVF in this day and age carries very few risks to the women undergoing such treatment. The most dreaded was the Hyperstimulation Syndrome where the number of eggs retrieved was in the region of above 30.
The present protocols are safer and reduce dramatically the incidence of these complications.
The single most important difference was the introduction of “freeze all” and transfer in a later cycle rather than at the fresh cycle. This is because of better freezing and thawing methods.