Diana Alecsandru1, Juan Antonio Garcia-Velasco2. 1. Department of Immunology, IVI RMA Madrid, Madrid, Spain; IVI Foundation, Health Research Institute La Fe, Valencia, Spain. 2. IVI Foundation, Health Research Institute La Fe, Valencia, Spain; Department of Reproductive Endocrinology and Infertility, IVI RMA Madrid, Madrid, Spain; Rey Juan Carlos University, Madrid, Spain.