How do you manage a patient with no history of miscarriage but who is unable to conceive, who has a positive lupus anticoagulant without diagnosis of antiphospholipid syndrome?  

I would be very leery of linking infertility to a positive lupus anticoagulant result. Whether or not the patient has antiphospholipid syndrome the evidence linking antiphospholipid antibodies to infertility (as opposed to loss of an established pregnancy) is somewhere between weak and nonexistent. ...