BackgroundAntiphospholipid syndrome (APS) is a group of clinical syndromes of thrombosis or adverse pregnancy outcomes caused by antiphospholipid antibodies. which increase the incidence of in vitro fertilization failure in patients with infertility. However. the common mechanism of repeated implantation failure (RIF) with APS is unclear. https://herbsdailyes.shop/product-category/specimen-collection-specimen-collection-kits/