Absence of luteal phase defect and spontaneous pregnancy in IVF patients despite GnRH-agonist trigger and “freeze all policy” without luteal phase support: a report of four cases

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Ali Sami Gurbuz, Ruya Deveer, Necati Ozcimen, Emel Ebru Ozcimen, Barbara Lawrenz, Manish Banker, Juan Antonio Garcia-Velasco & Human Mousavi Fatemi