<prompt> The earliest morphological evidence of ovulation is:Pseudo stratificationBasal vacuolationDecrease in glycogen contentPredecidual reaction  <response>: Subnuclear basal vacuolation : Ist HPE evidence of ovulation evidence of progesterone secretion Endometrial biopsy Invasive test EBX: HPE Formalin and AFB for TB Normal saline Done usually 2-4 days before expected date of mensesD24 - D26 Not done Post menses Secretory endometrium Progesterone acts on EBxtells cycle is ovulatory Proliferative endometrium: anovulatory Early secretory Subnuclear vacuolation Ist HPE evidence of progesterone secretion Seen on D16 of cycle Nuclei of glands gone up Stromal edema Late secretory Toous coiled glands All secretions in lumen of gland Cork screw glands on D20 of cycle Max stromal edema seen around D22of cycle HPE of Proliferative endometrium Pseudostratification Long tubular glands 