Hi Rosh, I have gone through your question and understand your concerns. Lupus anticoagulant and rheumatoid arthritis do not decrease the infertility, rather it increases the chances of miscarriage, intrauterine growth restriction, or sudden intrauterine death. Therefore, once you are pregnant, you need to be given heparin injection to maintain the good supply for fetus and hence to decrease the chances of adverse pregnancy outcome. Hope you found the answer helpful. Wishing you good health. Dr Deepti Verma