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Nomogram of the prediction model for failure to collect oocytes in POSEIDON Groups 3 and 4. AMH = anti-Müllerian hormone; COS = controlled ovarian stimulation; ∆E2 = change in E2 level between the day before trigger and the trigger day; COS protocol (1: Agonist; 2: Antagonist; 3: PPOS; 4: Mild stimulation/natural cycle); ∆E2 (1: ≥ 150 pg/ml; 2: < 150 pg/ml and ≥ 0 pg/ml; 3: < 0 pg/ml).
