Abstract
Follitropin delta (Δ) is a recombinant human follicle-stimulating hormone (rFSH), like natural human FSH, that can stimulate the development and growth of multiple follicles. Treatment with Follitropin-Δ may cause mild to severe adverse reactions, such as the risk of developing ovarian hyperstimulation syndrome, resulting in nausea, vomiting and diarrhea, weight loss, respiratory difficulty, stomach swelling and discomfort of the pelvic area, headaches, and fatigue. To date, the effects of a Follitropin-Δ overdosage are unknown, and no data are reported in the scientific literature or in the drug data sheet. Therefore, this study aimed to describe the effects of Follitropin-Δ overdosages in poorly responding women who underwent IVF cycles. This is a descriptive case series of four nulligravid, poorly responding patients, two of whom made requests for fertility preservation. Four poorly responding patients who were prescribed 20.0 µg/day of Follitropin-Δ for three consecutive days wrongly injected the total cartridge of 72 µg Follitropin-Δ every day. After the incorrect injection of Follitropin-Δ, the patients continued their controlled ovarian stimulation and underwent vaginal ovarian pick up. The analyzed patients had no side effects or adverse reactions. The evaluations reported in this case series showed that the accidental use of 72 µg/day of Follitropin-Δ for three days did not cause side effects or adverse reactions in poor responders.