ABSTRACT
Controlled ovarian stimulation (COS) is the single most effective measure ever undertaken for increasing assisted reproduction technology (ART) outcomes. COS, however, disrupts the proper support of the corpus luteum (CL) at the level of the anterior pituitary by altering the pulsatile release of luteinizing hormone (LH) (1). There is now a general consensus professing that progesterone supplementation must be provided in ART, at least during the first weeks following oocyte retrieval (1).
