A nurse is reviewing the history of a client who is at 28 weeks of gestation and has pre-term labor.

Which of the following factors increases the risk of pre-term labor?

Nitrazine paper test.

This test involves putting a drop of fluid obtained from the vagina onto paper strips containing nitrazine dye.

The strips change color depending on the pH of the fluid.The strips will turn blue if the pH is greater than 6.0, which indicates the presence of amniotic fluid.This test can help confirm rupture of membranes (ROM) in pregnancy, especially when preterm labor is suspected.

Choice B. Ferning test.This test involves examining a sample of vaginal fluid under a microscope and looking for a fern-like pattern that is formed by dried amniotic fluid crystals.This test can also help confirm ROM, but it is less reliable than the nitrazine test because other substances such as cervical mucus, semen, or blood can also cause ferning.

Choice C. Amniotic fluid index.This test involves measuring the amount of amniotic fluid in the uterus using ultrasound.This test can help assess the fetal well-being and detect conditions such as oligohydramnios (low amniotic fluid) or polyhydramnios (high amniotic fluid).This test cannot confirm ROM by itself, but it can be used in combination with other tests to evaluate the status of the pregnancy.

Choice D. Biophysical profile.This test involves using ultrasound and a fetal monitor to assess the fetal heart rate, breathing, movement, muscle tone, and amniotic fluid volume.

Corticosteroids are given to pregnant women who are at risk of preterm labor to help mature the lungs of the fetus and reduce the risk of respiratory distress syndrome and other complications.Corticosteroids also have a protective effect on the brain and reduce the risk of bleeding and cerebral palsy.

Choice A is wrong because administering intravenous fluids is not a specific intervention to address possible outcomes and complications of preterm labor.Intravenous fluids may be given to correct dehydration or electrolyte imbalance, but they do not prevent or treat preterm labor.

Choice B is wrong because administering tocolytics is an intervention to delay preterm labor, not to address possible outcomes and complications.

Tocolytics are drugs that inhibit uterine contractions and prolong pregnancy for a short period of time, usually 24 to 48 hours, to allow for the administration of corticosteroids or the transfer of the mother to a facility with neonatal intensive care.