Inclusion criteria were women who got recovered from Covid-19 based upon their history with positive test results confirmed via BeAware Bahrain phone application and Tawakkalna Saudi phone application; with age below 38 yrs., body mass index (BMI) below 30 kg/m2, who underwent antagonist protocol for IVF Exclusion criteria were chromosomal and genetic disorders, age> 38 years, BMI > 30, abnormal ultrasonogram of the uterine cavity (acquired or congenital), those who underwent long agonist protocol, and those cases with severe male factor, and abnormal embryos not suitable for transfer, we excluded also patients with those who got vaccinated against Covid-19 and those with current infection.