A nurse is assessing a client for pre-term labor.

Which diagnostic test should the nurse anticipate being ordered for this client?

According to the search results, magnesium sulfate can have a negative effect on the fetal heart rate (FHR) by lowering the baseline, decreasing the variability, and reducing the reactivity or acceleration pattern.Absent variability means that there is no fluctuation in the FHR and it indicates fetal hypoxia or acidosis.

This is a potential adverse effect of magnesium sulfate on the fetus and requires immediate intervention.

Choice A.Accelerations is wrong because accelerations are transient increases in the FHR that indicate fetal well-being.They are not affected by magnesium sulfate.

Choice B.Early decelerations is wrong because early decelerations are decreases in the FHR that occur with uterine contractions and are caused by fetal head compression.They are benign and do not indicate fetal distress.They are not associated with magnesium sulfate.

Choice C.Variable decelerations is wrong because variable decelerations are abrupt decreases in the FHR that vary in shape, duration, and timing and are caused by umbilical cord compression.

They may or may not indicate fetal compromise.

A cervical cerclage is a procedure that involves placing stitches around the cervix to prevent it from opening prematurely.This procedure is usually done for women who have a history of cervical insufficiency or a short cervix, which are risk factors for preterm labor.

Choice A is wrong because history of gestational diabetes is not a risk factor for preterm labor.

Gestational diabetes is a condition that causes high blood sugar during pregnancy and can affect the health of the mother and the baby, but it does not increase the risk of preterm labor.

Choice C is wrong because history of recurrent urinary tract infections (UTIs) is a risk factor for preterm labor.

UTIs are infections that affect the urinary system and can cause symptoms such as pain, burning, or frequent urination.

UTIs can also spread to the kidneys or the uterus and cause inflammation or infection that can trigger preterm labor.

Choice D is wrong because history of assisted reproductive technology (ART) is a risk factor for preterm labor.

ART refers to any medical procedure that helps with conception, such as in vitro fertilization (IVF).

ART can increase the risk of preterm labor because it can result in multiple gestations (twins, triplets, or more), which put more strain on the uterus and can cause it to contract prematurely.ART can also cause complications such as placenta previa or rupture of the uterus, which can lead to preterm labor.