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Kidney Disorders During Pregnancy

By

Lara A. Friel

, MD, PhD, University of Texas Health Medical School at Houston, McGovern Medical School

Last full review/revision Apr 2020| Content last modified Apr 2020
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Often, pregnancy does not cause a kidney disorder to worsen. Usually, kidney disorders worsen only in pregnant women who have high blood pressure that is not well-controlled. If pregnant women have a kidney disorder, they are more likely to develop high blood pressure, including preeclampsia (a type of high blood pressure that develops during pregnancy)

Having a chronic kidney disorder before becoming pregnant increases the risk that the fetus will not grow as much as expected (small for gestational age) or be stillborn. Having a severe kidney disorder usually prevents women from carrying a baby to term.

In pregnant women who have a kidney disorder, kidney function and blood pressure are monitored closely, as is growth of the fetus. If the kidney disorder is severe, women may need to be hospitalized after 28 weeks of pregnancy so that bed rest is guaranteed, blood pressure can be controlled well, and the fetus can be monitored closely.

Women who have had a kidney transplant are usually able to safely give birth to healthy babies if they have all of the following:

  • A transplant that has been in place for 2 or more years

  • Normal kidney function

  • No episodes of rejection

  • Normal blood pressure

Women who have a kidney disorder that regularly requires hemodialysis are often at high risk of pregnancy complications, including miscarriage, stillbirth, preterm birth, and preeclampsia. But because of advances in dialysis treatment, up to 90% of babies born to these women survive.

Usually, delivery is required before the due date because the woman develops preeclampsia or the fetus is not growing as much as expected. Doctors may remove and analyze a sample of the fluid that surrounds the fetus (amniotic fluid). This procedure, called amniocentesis, helps doctors determine whether the fetus’s lungs are mature enough to breathe air and thus when the baby can be delivered safely.

Cesarean delivery is often done, but sometimes vaginal delivery is possible.

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