TIPPS: Thrombophilia in Pregnancy Prophylaxis Study

"Subject's randomize to treatment arm will receive dalteparin sodium 5,000 IU s.c. daily starting on randomization day until 20 weeks gestational age then;~dalteparin sodium 5,000 IU s.c. bid from 20 weeks to onset of labour or 37 weeks gestation (discontinued at the discretion of the investigator/obstetrician)~Within 24 hours of delivery, all subject's, regardless of randomization allocation will receive dalteparin sodium 5,000 IU s.c. daily for 6 weeks post-partum"