Low molecular weight heparin (LMWH) is used during pregnancy mainly to prevent harmful blood clots and improve blood flow between the mother and the baby. Doctors may prescribe it to women who have a history of blood-clotting problems, repeated miscarriages, certain autoimmune conditions, restricted blood flow to the placenta, growth restriction in the baby, or other high-risk pregnancy conditions. It helps keep the blood flowing smoothly and may reduce complications related to poor placental circulation. LMWH is generally considered safe in pregnancy because it does not cross the placenta and therefore does not directly affect the baby. The injections are usually given under the skin once or twice daily, and regular follow-up with your doctor is important to monitor both the mother and baby during treatment. Some women may notice mild bruising, pain, or swelling at the injection site, but serious side effects are uncommon when the medicine is used correctly under medical supervision. Along with the injections, maintaining good hydration, healthy nutrition, regular antenatal check-ups, and following your doctor's advice carefully can help support a healthier pregnancy outcome.