Assessment of Intralipid Efficacy in Women With Unexplained Recurrent Implantation Failure

Inclusion Criteria: * Age 20-38 years of age. * Repeated implantation failure with 3 or more failed IVF cycles with good quality embryos. * Normal trans-vaginal ultrasonography. * Normal hysteroscopy. * Normal male and female karyotyping. * Normal anti cardiolipin antibody IGG, IGM and Lupus anticoagulant. * Normal thrombophilia screen in the form of protein c, s, anti thrombin iii and factor v leiden. * Written and signed informed consent by the patient to participate in the study. Exclusion Criteria: * Age more than 38 years. * Less than 3 failed IVF cycles. * Poor embryo quality. * Expected poor ovarian response. * Abnormal trans-vaginal ultrasound findings e.g. endometrial polyps or fibroids. * Abnormal male or female karyotyping. * Abnormal hysteroscopic finding e.g. endometrial polyps, endometrial hyperplasia, fibroid or congenital anomalies. * Positive Anticardiolipin antibodies or Lupus anticoagulant. * Positive thrombophilia screen. * Allergy to soy oil, eggs, peanut, peanut-based products or any active ingredient in the infusion. * Mental condition rendering the patients unable to understand the nature, scope and possible consequences of the study.