Platelet Rich Plasma for Insufficient Endometrium

Inclusion Criteria: * Patients who have previously undergone at least 2 unsuccessful frozen embryo transfer cycles, defined as failure to achieve a sustained clinical pregnancy (visualization of intrauterine gestational sac on ultrasound or a cancelled embryo transfer cycle due to inadequate endometrial thickness * Patients with a diagnosis of thin endometrial lining (less than or equal to 6 mm maximum thickness) during prior unsuccessful or canceled embryo transfer cycles. Exclusion Criteria: * Fewer than 2 prior unsuccessful or canceled frozen embryo transfer cycles. * Most recent unsuccessful embryo transfer prior to January 1, 2017. * Mullerian anomalies, excluding arcuate uterus * Concurrent submucosal fibroids, unrepaired uterine defects or present indication for uterine surgery * Communicating hydrosalpinx without plans for surgical correction prior to study enrollment. * Failure of patient to agree to enrollment in study with written consent. * Concurrent pregnancy * Anticoagulation use for which plasma infusion is contraindicated * History of thrombosis * Thrombophilia either inherited or acquired * Concomitant use of adjunctive therapies for proliferation. These must be discontinued upon enrollment. * Embryo planned to be used for transfer generated from surgically obtained sperm due to a diagnosis of non-obstructive azoospermia * Recurrent/persistent endometrial fluid in prior cycles