What Are the Pregnancy Risks for Women With ADPKD?

For many women with Autosomal Dominant Polycystic Kidney Disease (ADPKD), it is entirely possible to have a safe and successful pregnancy. However, because ADPKD affects kidney function and blood pressure, pregnancy requires careful individualized planning. Rather than assuming all ADPKD pregnancies are identical, doctors assess your specific risk based on your baseline kidney health before conception ^[1][2].

Before Trying: Assessing Your Individual Risk

Your personal risk level during pregnancy depends heavily on three factors before you conceive: your kidney function, your blood pressure, and the amount of protein in your urine (proteinuria) ^[1][3].

• Favorable Outlook: Women with preserved kidney function, controlled blood pressure, and little or no proteinuria generally have lower risks of complications ^[1][2].
• Higher Risk: Women with reduced kidney function (chronic kidney disease or CKD), substantial proteinuria, uncontrolled high blood pressure, prior preterm birth, or a history of pre-eclampsia require more intensive co-management ^[2][3]. If you have a family history of intracranial aneurysms (blood vessel bulges in the brain), your doctor may also review this before pregnancy.

Medication Planning: Managing blood pressure is critical, but some common medications like ACE inhibitors and ARBs are contraindicated (unsafe) during pregnancy because of fetal safety concerns, and must be replaced with pregnancy-safe alternatives ^[4]. Additionally, tolvaptan, a drug used to slow ADPKD progression, should not be used during pregnancy ^[5]. Do not stop or change these medications on your own. You should establish a written medication plan with your nephrologist (kidney doctor) well before stopping birth control to safely transition your treatments ^[4][5].

During Pregnancy: Monitoring and Risks

Your care should involve a collaborative team, including your nephrologist and a Maternal-Fetal Medicine (MFM) specialist (an obstetrician specializing in high-risk pregnancies) ^[1][5].

How Your Kidneys Are Monitored: Before pregnancy, doctors use a calculation called “eGFR” to estimate your kidney function. However, standard eGFR equations are not reliable during pregnancy. Instead, your care team will track trends in your serum creatinine (a blood marker), blood pressure, and quantitative urine protein ^[1][6]. While some limited evidence suggests pregnancy hormones might temporarily increase kidney cyst growth, the long-term impact of this on ADPKD progression is uncertain ^[2][1].

Pre-Eclampsia and Aspirin Prophylaxis: Women with ADPKD have a higher risk of developing pre-eclampsia ^[7]. Pre-eclampsia is a serious condition diagnosed after 20 weeks of pregnancy, involving new high blood pressure along with protein in the urine or signs of damage to other organs. Because having CKD increases this risk, many medical guidelines recommend asking your doctor if low-dose aspirin is appropriate for you (often started between 12 to 16 weeks) to help reduce pre-eclampsia risk ^[5]. Do not start taking aspirin without your doctor’s guidance.

Urgent Warning Signs of Pre-Eclampsia
Pre-eclampsia can develop gradually, and pre-existing ADPKD symptoms can sometimes make it difficult to recognize. Seek urgent medical care if you experience:

• Severe or persistent headache
• Visual changes (blurriness, seeing spots)
• Right upper abdominal pain (under the ribs)
• Shortness of breath
• Markedly elevated blood pressure readings
• Rapidly increasing swelling (mild swelling is normal in pregnancy, but sudden or severe edema requires prompt evaluation)

Risks to the Baby: A Mayo Clinic study comparing pregnancies in 54 women with ADPKD to 92 women with simple kidney cysts found that miscarriage rates were similar between the groups ^[7]. However, premature birth (delivering before 37 weeks) occurred in 11.1% of the ADPKD group compared to 6.8% in the simple cyst group, and nonreassuring fetal status (previously called “fetal distress”) was also significantly more common ^[7]. These risks underscore the need for regular fetal growth ultrasounds throughout your pregnancy ^[1].

After Delivery: Postpartum Care

Care does not end at delivery. Pregnancy can sometimes be followed by changes in kidney function, and pre-eclampsia can even develop in the postpartum period ^[1][7]. Ensure you have a scheduled postpartum review of your blood pressure, serum creatinine, and urine protein ^[1]. You will also need to discuss with your doctor which blood pressure medications are safe for breastfeeding and when it is appropriate to resume ADPKD-specific therapies like tolvaptan ^[5].

Family Planning and Inheritance

ADPKD is an autosomal dominant condition, meaning that if one parent carries the genetic variant, each child has a 50% chance of inheriting it, regardless of the child’s sex ^[8][9]. Inheriting the variant means the child will likely develop ADPKD, but it does not predict exactly when symptoms will appear or how severe the disease will be.

Decisions about family planning are deeply personal, and there is no single “right” reproductive choice. If you wish to understand or reduce the risk of passing on the condition, you have several options:

• PGT-M (Preimplantation Genetic Testing for Monogenic conditions): This uses In Vitro Fertilization (IVF) to test embryos and select ones without your familial ADPKD variant for transfer ^[10][11]. While effective, PGT-M is not guaranteed to result in a pregnancy or an unaffected child, it requires your family’s specific mutation to be identified beforehand, and it involves the financial and physical demands of IVF ^[12][10]. Confirmatory prenatal testing during the pregnancy is still sometimes offered.
• Natural Conception with Prenatal Diagnosis: Conceiving naturally and testing the fetus during pregnancy (via chorionic villus sampling or amniocentesis) ^[10].
• Other Options: Using donor eggs or donor sperm, adoption, or choosing not to pursue pregnancy. Discussing these options with a genetic counselor can help you make an informed decision that aligns with your family’s goals.