A woman complains of severe abdominal and pelvic pain around the time of menstruation that has gotten worse over the last 5 years. She also complains of pain during intercourse and has tried unsuccessfully to get pregnant for the past 18 months. These symptoms are most likely related to:

Choice A reason: Partial abruptio placentae is not the correct answer, as it does not always require delivery by cesarean section. Partial abruptio placentae is a condition where the placenta partially separates from the uterine wall before the baby is born. This can cause bleeding, pain, and fetal distress. Depending on the severity of the condition, the gestational age, and the fetal status, the delivery may be vaginal or cesarean.

Choice B reason: Ectopic pregnancy is not the correct answer, as it does not require delivery by cesarean section. Ectopic pregnancy is a condition where the fertilized egg implants outside the uterus, usually in the fallopian tube. This can cause bleeding, pain, and rupture of the tube. Ectopic pregnancy is not viable and needs to be removed surgically or treated with medication. It cannot result in a live birth².

Choice C reason: Eclampsia is not the correct answer, as it does not always require delivery by cesarean section. Eclampsia is a severe complication of preeclampsia, a condition where the pregnant woman develops high blood pressure and protein in the urine. Eclampsia can cause seizures, coma, and death for the mother and the baby. The only cure for eclampsia is delivery of the baby, which may be vaginal or cesarean depending on the maternal and fetal condition.

Choice D reason: Total placenta previa is the correct answer, as it always requires delivery by cesarean section. Total placenta previa is a condition where the placenta completely covers the cervix, the opening of the uterus. This can cause painless bleeding, preterm labor, and fetal distress. Vaginal delivery is impossible and dangerous, as it can cause severe bleeding and damage to the placenta and the baby. Cesarean section is the only safe way to deliver the baby.

Choice A reason: This is not the correct answer, as the pregnant woman does not use glucose at a more rapid rate than the nonpregnant woman. In fact, the pregnant woman has lower fasting glucose levels and higher postprandial glucose levels than the nonpregnant woman. This is because the pregnant woman adapts to the increased fetal demand for glucose by increasing her insulin secretion and decreasing her hepatic glucose production.

Choice B reason: This is the correct answer, as placental hormones are antagonistic to insulin, thus resulting in insulin resistance. Insulin resistance is a condition where the cells do not respond well to insulin and require more insulin to maintain normal glucose levels. Placental hormones, such as human placental lactogen, progesterone, and cortisol, increase the insulin resistance of the maternal tissues, especially in the second and third trimesters of pregnancy. This is to ensure that the fetus has enough glucose supply, as the placenta is not insulin resistant and can transport glucose to the fetus².

Choice C reason: This is not the correct answer, as pancreatic function in the islets of Langerhans is not affected by pregnancy. The islets of Langerhans are clusters of cells in the pancreas that produce hormones, such as insulin and glucagon, that regulate glucose metabolism. Pregnancy does not impair the function of the islets of Langerhans, but rather stimulates them to increase their size and number. This is to compensate for the increased insulin resistance and glucose demand of the pregnancy.

Choice D reason: This is not the correct answer, as the pregnant woman does not increase her dietary intake significantly. The pregnant woman needs to consume adequate calories and nutrients to support the fetal growth and development, but not excessively. The recommended weight gain during pregnancy depends on the pre-pregnancy BMI of the woman, but generally ranges from 11 to 16 kg. The recommended calorie intake during pregnancy is about 300 kcal more than the pre-pregnancy intake, which is equivalent to one extra snack per day.