Thanks for the query,
Protein S levels fall progressively during pregnancy.
Heparin is a drug which reduces chances of clotting and pulmonary embolism
Drugs like clomiphene citrate can be taken with Heparin.
Protein S deficiency
causes 10 fold increased risk of thrombosis
develops in 60-80% of patients with Protein S deficiency.
So think before you plan for your next pregnancy.
Hope this helps,