It is determined that a client's blood Rh is negative and her partner's is positive. To help prevent Rh isoimmunization, the nurse would expect to administer Rho(D) immune globulin at which time?

Choice A Reason: This is incorrect because difficulty in arousing is a sign of magnesium toxicity, which is a serious complication of magnesium sulfate therapy. Magnesium toxicity can cause central nervous system depression, muscle weakness, and cardiac arrest. The nurse should monitor the client's level of consciousness and stop the infusion if the client becomes lethargic or unresponsive.

Choice B Reason: This is correct because deep tendon reflexes 2+ indicate a normal and expected response to magnesium sulfate therapy. Magnesium sulfate is a muscle relaxant that can reduce the risk of seizures in gestational hypertension. The nurse should assess the client's deep tendon reflexes regularly and maintain them at 2+ or slightly diminished.

Choice C Reason: This is incorrect because urinary output of 30 mL per hour is below the normal range of 40 to 80 mL per hour and may indicate renal impairment or dehydration. Magnesium sulfate can cause renal toxicity or fluid retention, which can affect the urinary output. The nurse should monitor the client's urinary output and fluid balance and report any abnormalities to the doctor.

Choice D Reason: This is incorrect because respiratory rate of 10 breaths/minute is below the normal range of 12 to 20 breaths/minute and may indicate respiratory depression. Magnesium sulfate can cause respiratory depression or failure, which can be life-threatening. The nurse should monitor the client's respiratory rate and oxygen saturation and administer oxygen or antidote if needed.

Choice A Reason: This is incorrect because ultrasound visualization of the fetus is a positive sign of pregnancy, not a probable sign. A positive sign of pregnancy is a direct and definitive evidence of the presence of a fetus, such as fetal movement felt by the examiner or fetal heart sounds heard by a Doppler device.

Choice B Reason: This is correct because softening of the cervix, also known as Goodell's sign, is a probable sign of pregnancy. A probable sign of pregnancy is a strong indication of pregnancy based on physical changes in the reproductive organs, such as enlargement of the uterus or changes in the shape and consistency of the cervix.

Choice C Reason: This is correct because a positive pregnancy test, which detects human chorionic gonadotropin (hCG) in urine or blood, is a probable sign of pregnancy. However, it is not a conclusive sign, as hCG can also be produced by other conditions such as ectopic pregnancy, molar pregnancy, or trophoblastic tumors.

Choice D Reason: This is correct because absence of menstruation, also known as amenorrhea, is a probable sign of pregnancy. It occurs when ovulation and menstruation cease due to hormonal changes during pregnancy. However, it is not a definitive sign, as amenorrhea can also be caused by other factors such as stress, illness, or hormonal imbalances.

Choice E Reason: This is correct because ballottement, which is a rebounding of the fetus against the examiner's fingers during a pelvic examination, is a probable sign of pregnancy. It can be felt around 16 to 20 weeks of gestation.

Choice F Reason: This is incorrect because auscultation of a fetal heart beat, which can be heard by a fetoscope around 18 to 20 weeks of gestation or by a Doppler device around 10 to 12 weeks of gestation, is a positive sign of pregnancy, not a probable sign.