What consideration should be taken when prescribing anticoagulants to a pregnant woman?

When considering anticoagulants for a pregnant woman, it is essential to recognize that some anticoagulants pose risks to the developing fetus. Warfarin is indeed contraindicated during pregnancy due to its ability to cross the placenta and cause teratogenic effects, particularly during the first trimester. This can lead to serious fetal complications, including fetal hemorrhage and central nervous system abnormalities.

While heparin, especially low molecular weight heparin, is typically considered safe during pregnancy and is often used to manage conditions requiring anticoagulation, it does not cross the placenta. Therefore, the safety profile of heparin stands in contrast to that of warfarin, making the consideration of anticoagulant choice during pregnancy critical for maternal and fetal safety.

Other options imply incorrect safety perceptions regarding anticoagulant use in pregnancy. Not all anticoagulants are safe, and although heparin is commonly used and approved, it is the understanding that only Heparin's safety applies, while Warfarin remains contraindicated. Furthermore, dosage for anticoagulants like heparin is not based solely on weight; it is often titrated according to various factors including the patient's response to therapy and laboratory monitoring (e.g., anti-Xa levels), making the