How is OHSS (Ovarian Hyperstimulation Syndrome) prevented?

Multi-layered prevention approach. Risk Assessment: AMH and AFC baseline measurements, previous response monitoring, BMI and metabolic considerations, genetic predisposition evaluation. Prevention Protocols: individualized stimulation protocols, GnRH antagonist protocols when appropriate, trigger shot timing optimization (Lupron vs. hCG), freeze-all embryo policies for high-risk patients, coasting protocols for elevated estradiol. Monitoring: daily estradiol and LH measurements, serial follicle measurements, symptom tracking applications, 24/7 emergency contact protocols. Success Rate: under 1% severe OHSS with modern protocols.