No. Combined oral contraceptives (OCPs) and GnRH analogues do not guarantee delayed oocyte loss.
Concha Leal Cariñena
Bachelor's Degree in Medicine from the University of Zaragoza. She has an extensive career as a gynaecologist specialising in assisted reproduction and is also an associate lecturer in the Department of Surgery, Gynaecology and Obstetrics at the University of Zaragoza