No room for cancellation, coasting, or ovarian hyperstimulation syndrome in oocyte donation cycles.

We retrospectively studied 429 IVF donor cycles in which ovulation was triggered with either hCG (175 cycles) or GnRH agonist (254 cycles). Of the donors in whom ovulation was triggered with hCG, 3.2% developed symptoms of moderate (2.2%) or severe (1%) ovarian hyperstimulation syndrome, while none of the IVF donor cycles that were triggered with the GnRH agonist presented ovarian hyperstimulation syndrome, needed coasting, or were cancelled.