Intranasal Nafarelin For Triggering Oocyte Maturation

Inclusion Criteria: * Oocyte donor * Undergoing a progesterone-primed ovarian stimulation cycle (PPOS) with any commercially available gonadotropin preparation(s) * BMI 18 - 30 kg/m2 * ≥10 follicles of ≥14mm average diameter on the last ultrasound prior to trigger administration * Able and willing to provide written informed consent Exclusion Criteria: * Allergy or hypersensitivity to either of the study drugs * Hypopituitarism * Known pituitary tumour * Contraindication to intranasal medication administration * Previous poor response to agonist trigger