Who needs this heparin? There are some high blood viscosity or some risk of blood clots, and some pregnant women are some immune factors cause of recurrent abortion, the doctor will suggest he play the heparin sodium treatment, from this perspective also spuc heparin, generally until the mid gestation and late pregnancy may recommend that pregnant women have been use in accordance with heparin to spuc, or pregnant women are likely to produce some blood clots, placenta thrombosis, umbilical cord blood clots, will have the risk of fetal intrauterine death, so if the doctor suggested that you use the heparin sodium, will keep on using.