The hormone responsible for maturation of mammary gland tissue is:

Choice A reason: Urinary frequency is a common symptom of pregnancy, especially in the first and third trimesters, due to the increased pressure of the uterus on the bladder. It is not a sign of complication and does not need to be reported immediately.

Choice B reason: Rupture of membranes is the breaking of the amniotic sac, which can occur spontaneously or artificially before or during labor. It is a sign of impending delivery and can increase the risk of infection. It should be reported immediately to the health care provider.

Choice C reason: Heartburn accompanied by severe headache can indicate preeclampsia, a serious condition characterized by high blood pressure and proteinuria in pregnancy. It can lead to eclampsia, which is a life-threatening seizure disorder. It should be reported immediately to the health care provider.

Choice D reason: Decreased libido is a normal change in pregnancy, due to hormonal fluctuations, physical discomfort, and emotional stress. It is not a sign of complication and does not need to be reported immediately.

Choice E reason: Vaginal bleeding can indicate various complications in pregnancy, such as placenta previa, placental abruption, or miscarriage. It can pose a threat to the mother and the fetus. It should be reported immediately to the health care provider.

Choice A reason: Nonreactive is not the correct result, as it indicates that the FHR does not show adequate accelerations with fetal movement. A nonreactive NST means that the FHR does not increase by at least 15 beats/min for at least 15 seconds in a 20-minute period. A nonreactive NST may suggest fetal hypoxia (low oxygen) or fetal sleep.

Choice B reason: Reactive is the correct result, as it indicates that the FHR shows adequate accelerations with fetal movement. A reactive NST means that the FHR increases by at least 15 beats/min for at least 15 seconds twice or more in a 20-minute period. A reactive NST is reassuring and suggests that the fetus is well-oxygenated and healthy.

Choice C reason: Positive is not the correct result, as it is not used to describe the NST. Positive is a term used for the contraction stress test (CST), which is a different test that measures the FHR in response to uterine contractions. A positive CST means that the FHR shows late decelerations (decreases in the FHR that begin after the peak of a contraction and return to the baseline after the contraction ends) with at least 50% of the contractions. A positive CST indicates uteroplacental insufficiency (a condition where the placenta does not deliver enough oxygen and nutrients to the fetus) and fetal distress.

Choice D reason: Negative is not the correct result, as it is also not used to describe the NST. Negative is another term used for the CST, which is a different test that measures the FHR in response to uterine contractions. A negative CST means that the FHR does not show any late decelerations during at least three contractions in a 10-minute period. A negative CST is reassuring and suggests that the fetus is well-oxygenated and can tolerate labor.