Magnesium sulfate
Magnesium sulfate is used often in patients with preeclampsia and eclampsia, can inadvertently inhibit uterine contractions. In addition, preeclampsia can lead to blood disorders such as thrombocytopenia, platelet abnormalities, and disseminated intravascular coagulation. Cesarean delivery, especially after prolonged labor, may cause the muscles of the uterus to become tired and stop contracting or contraction can be inhibited at the surgical site.