50 grams of Magnesium sulfate is added to 1L of Lactated Ringers.
After giving an initial loading dose, the nurse is to infuse a maintenance dose of 2 gm/hr. What rate should the IV pump be set at?

Choice A rationale
Abdominal pain accompanied by minimal red vaginal bleeding is not a typical symptom of placenta previa. In placenta previa, the placenta covers all or part of the cervix, which can cause severe bleeding. However, this bleeding is typically not associated with abdominal pain.
Choice B rationale
Intermittent abdominal pain following the passage of bloody mucus is not a common symptom of placenta previa. This symptom is more commonly associated with labor or other conditions, but not specifically with placenta previa.
Choice C rationale
Increasing abdominal pain with a nonrelaxed uterus is not a typical symptom of placenta previa. This could be a sign of other complications such as uterine rupture or placental abruption, which are serious conditions that require immediate medical attention.
Choice D rationale
Painless red vaginal bleeding is indeed a symptom of placenta previa. This bleeding is usually bright red and can occur intermittently or continuously. It is most common in the third trimester of pregnancy.

Choice A rationale
Estrogen is a hormone that plays a crucial role in pregnancy. It helps develop the placenta and triggers increased blood volume and flow throughout pregnancy. However, it is not the primary hormone responsible for maintaining pregnancy.
Choice B rationale
Oxytocin is a hormone that plays a key role in labor and breastfeeding. It causes contractions during labor and helps eject milk during breastfeeding. However, it is not the primary hormone responsible for maintaining pregnancy.
Choice C rationale
Human chorionic gonadotropin (hCG) is a hormone produced during pregnancy. It is made almost exclusively in the placenta and its main function is to maintain the corpus luteum in the ovary and stimulate it to produce progesterone. However, hCG itself is not the primary hormone responsible for maintaining pregnancy.
Choice D rationale
Progesterone is the primary hormone responsible for maintaining pregnancy. It prevents the uterine muscles from contracting prematurely, which could lead to a miscarriage or preterm birth.