More than one injection of Elonva within one treatment cycle or too high a dose of Elonva and/or (rec)FSH may increase the risk of OHSS. After administration of Elonva, no additional FSH-containing product should be administered prior to stimulation day 8, as this may also increase the risk of OHSS. (See Ovarian Hyperstimulation Syndrome (OHSS) under Precautions.)