A client is at the antepartal clinic for a pregnancy test.Which finding, if present, would be considered a positive sign of pregnancy?

The correct answer is choice B. She works as a part-time oncology nurse.This is because oncology nurses are exposed toteratogenic agents, which are substances that can cause abnormalities in an exposed fetus.Teratogenic agents can cross the placenta and alter fetal morphology or function.Examples of teratogenic agents are lead, methyl mercury, polychlorinated biphenyls, lithium, vitamin K antagonists, tobacco, rubella, cytomegalovirus, ionizing agents, hyperthermia, diabetes, and some drugs.

Choice A is wrong because living with two dogs at home does not pose a high risk for exposure to teratogenic agents.Dogs can be beneficial for pregnant women as they provide companionship and exercise.

Choice C is wrong because being a lacto-ova vegetarian does not pose a high risk for exposure to teratogenic agents.Lacto-ova vegetarians can get adequate nutrition from plant-based foods, dairy products, and eggs.

Choice D is wrong because commuting to work on a train does not pose a high risk for exposure to teratogenic agents.Trains are a safe and convenient mode of transportation for pregnant women.

he correct answer is choice B. Sufficient perfusion and circulation of the fetus.This is because the fetal heart rate is within the normal range of 110 to 160 beats per minute, and there is moderate beat-to-beat variability, which indicates a healthy nervous system.

Choice A is wrong because insufficient perfusion of the placenta would cause fetal distress and abnormal fetal heart rate patterns, such as late decelerations or minimal variability.

Choice C is wrong because maternal hypoxia would not directly affect the fetal heart rate, unless it leads to placental insufficiency or uterine hyperstimulation.

Choice D is wrong because fetal hypoxia would cause signs of fetal distress, such as tachycardia, bradycardia, or absent variability.