Chronic kidney disease during pregnancy is managed with closer check-ups, regular blood pressure and urine tests, blood tests to track kidney function, and scans to monitor the baby’s growth. A kidney specialist and pregnancy-care team should review medicines, nutrition, and any need for treatment changes. Taking prescribed medicines as directed, attending every appointment, and reporting warning signs promptly can help the team respond early to complications.
Why does chronic kidney disease need special care during pregnancy?
Chronic kidney disease (CKD) affects how well the kidneys filter waste and balance fluids in the body. During pregnancy, the kidneys work differently, and the additional demands on the body can make existing kidney problems more difficult to manage. Pregnancy is possible for many people with CKD, but the risks depend on kidney function, blood pressure, urine protein levels, the underlying cause of kidney disease, and any other medical conditions.
Complications can include pre-eclampsia, worsening kidney function, restricted growth of the baby, and premature birth. These outcomes are not inevitable. People with relatively stable kidney function and well-controlled blood pressure may have a different outlook from those with advanced or progressive kidney disease. Understanding the starting level of kidney function and monitoring changes throughout pregnancy help the care team identify concerns and plan appropriate treatment.
How should you plan pregnancy care with kidney disease?
Ideally, arrange a pre-pregnancy consultation with a kidney specialist (nephrologist) and an obstetrician experienced in high-risk pregnancies. This appointment allows the team to assess kidney function, review blood pressure and other health conditions, and identify medicines that may need to be changed before conception. It is also an opportunity to discuss how pregnancy could affect kidney health and what monitoring may be needed.
If you are already pregnant, contact your kidney specialist and maternity team as early as possible. You do not need to wait for your next routine appointment to request a review. The Clinical Practice Guideline on Pregnancy and Renal Disease, published in BMC Nephrology, recommends coordinated care involving an obstetrician, a kidney specialist or suitably experienced physician, and a midwifery team. Depending on your circumstances, a dietitian, pharmacist, diabetes specialist, or dialysis team may also be involved.
Which tests and check-ups help monitor kidney health?
Your healthcare team will establish a baseline early in pregnancy and compare later results with it. The frequency of appointments and tests depends on kidney function, blood pressure, symptoms, and any changes in your results. Some people need more frequent reviews than others, particularly if kidney disease is advanced or blood pressure is difficult to control.
Blood tests and urine checks
Blood tests commonly include serum creatinine, which helps assess kidney function, and other measurements chosen according to your condition. During pregnancy, standard estimated glomerular filtration rate (eGFR) calculations are not reliable for assessing kidney function, so clinicians generally use serum creatinine and interpret the result in the context of pregnancy and previous results. Tests for anaemia, electrolytes, and other complications may also be appropriate.
Urine testing helps the team measure protein loss and identify possible urinary tract infections. Measuring urine protein quantitatively provides a baseline for comparison later in pregnancy. An increase in protein levels can have several explanations, so clinicians consider the amount of change, blood pressure, kidney function, timing, and other findings before deciding what it means.
Blood pressure and the baby's growth
Blood pressure should be checked regularly because high blood pressure can affect both kidney health and pregnancy outcomes. Your team may recommend home monitoring with a suitable blood pressure monitor and a written record of readings. Follow the measurement technique and target recommended by your healthcare professional rather than changing treatment in response to an isolated reading without guidance.
The baby may need additional ultrasound scans to assess growth and wellbeing. The team may also check the amount of amniotic fluid surrounding the baby. The American Kidney Fund's guidance on CKD and pregnancy describes monitoring blood pressure, urine protein, kidney-related blood tests, and fetal growth as important parts of pregnancy care for people with kidney disease.
How can you control blood pressure and reduce the risk of pre-eclampsia?
Managing blood pressure is an important part of protecting kidney function during pregnancy. Your clinician will decide whether medication is needed, which medicine is suitable, and what blood pressure range is appropriate for you. Medicines such as labetalol, nifedipine, and methyldopa may be used during pregnancy when clinically appropriate. Never change a dose or stop treatment simply because your blood pressure readings appear normal without discussing this with your care team.
Pre-eclampsia is a pregnancy-related condition involving high blood pressure and possible effects on organs such as the kidneys and liver. It can occur in someone with pre-existing CKD, and it may be harder to recognise when high blood pressure or protein in the urine was already present. A substantial change from your usual blood pressure, a marked increase in urine protein, or changes in blood tests may prompt further assessment.
The Clinical Practice Guideline on Pregnancy and Renal Disease recommends that people with CKD be offered low-dose aspirin during pregnancy to reduce the risk of pre-eclampsia. Your obstetrician should determine whether aspirin is appropriate for you, when to start it, and which dose to use. Do not begin aspirin on your own, as the recommendation must be considered alongside your medical history and any reasons it may not be suitable.
Which medicines need reviewing during pregnancy?
Some medicines used to protect kidney function before pregnancy are not suitable during pregnancy. These include angiotensin-converting enzyme (ACE) inhibitors, many of which have names ending in “-pril,” and angiotensin receptor blockers (ARBs), often ending in “-sartan.” If you are planning a pregnancy, ask your prescriber for a medication review in advance. If pregnancy is confirmed while you are taking one of these medicines, contact your healthcare professional promptly so that it can be stopped or replaced under medical guidance.
NICE guidance on hypertension in pregnancy advises that ACE inhibitors and ARBs should be stopped when pregnancy is confirmed and that suitable alternative treatment should be offered. Other medicines, including certain immunosuppressants used for autoimmune kidney disease or after a transplant, also require careful review. For example, mycophenolate should not be used during pregnancy. Do not stop transplant medicines, steroids, or other prescribed treatments without specialist advice, because uncontrolled disease can also put your health at risk.
Review non-prescription products with your doctor or pharmacist as well. Some painkillers, herbal remedies, and nutritional supplements may be unsuitable because of kidney disease, pregnancy, interactions with prescribed medicines, or their effects on fluid and electrolyte balance. Tell your care team about everything you take, including medicines obtained without a prescription.
What should you eat and drink during pregnancy with CKD?
Good nutrition supports your health and the baby's growth, but kidney disease can change your nutritional needs. A renal dietitian who understands pregnancy can help you develop a plan that provides enough energy and nutrients while accounting for kidney function, blood test results, blood pressure, and any other conditions, such as diabetes. Your nutritional requirements may change as the pregnancy progresses.
Protein, sodium, potassium, and other nutrients may need individual attention, but not everyone with CKD needs the same dietary restrictions. Avoid starting a high-protein diet, severely restricting salt or potassium, or eliminating major food groups without professional advice. Inadequate intake can make it harder to meet pregnancy-related nutritional needs, while inappropriate restrictions may not suit your kidney condition.
Fluid intake should also follow your individual care plan. Some people with kidney disease need guidance about fluid limits, while others do not. Do not force yourself to drink excessive amounts or sharply restrict fluids unless your clinical team has advised you to do so. Ask whether you need supplements such as iron, folic acid, vitamin D, or pregnancy-specific vitamins, and which products and doses are appropriate for you.
Which daily habits can support a healthier pregnancy?
Attend scheduled antenatal and kidney appointments even when you feel well, since high blood pressure or changes in kidney function may not cause obvious symptoms at first. Take prescribed medicines consistently, follow the agreed plan for home blood pressure checks, and keep a record of readings or new symptoms if your care team recommends it. Share changes in your health with the clinicians responsible for your pregnancy and kidney care.
Unless your healthcare professional advises otherwise, aim for regular, pregnancy-appropriate physical activity and adequate rest. Avoid smoking and alcohol during pregnancy. Seek advice if nausea, vomiting, or difficulty eating and drinking makes it hard to take medicines or maintain nutrition. Your team may need to adjust your plan if you become dehydrated, develop an infection, or experience a flare of an underlying kidney condition.
When should you seek urgent medical attention?
Contact your maternity unit or seek urgent medical assessment if you experience symptoms that could be associated with pre-eclampsia. Examples include:
- A severe or persistent headache.
- Blurred vision, flashing lights, or other new vision changes.
- Severe or persistent pain just below the ribs.
- Sudden swelling of the face or hands, or a sudden increase in swelling elsewhere.
- Repeated vomiting or feeling unusually unwell, particularly alongside other warning signs.
According to the NHS guidance on pre-eclampsia, these symptoms need immediate medical assessment. They do not establish a diagnosis on their own, but they should not be ignored during pregnancy, especially when kidney disease is already present. Severe breathing difficulty, chest pain, collapse, or another potentially life-threatening symptom also requires emergency care.
What if you have advanced CKD or need dialysis?
Pregnancy with advanced CKD requires particularly close specialist supervision because the risks to kidney function and pregnancy outcomes can be higher. The care plan may involve more frequent blood tests and appointments, additional fetal monitoring, and treatment changes based on your kidney function, fluid balance, blood pressure, and nutritional needs.
If you already receive dialysis, your nephrology and maternity teams should coordinate treatment throughout pregnancy. Dialysis arrangements may need to change as pregnancy progresses, based on laboratory results, fluid balance, symptoms, and the baby's wellbeing. People whose kidney function deteriorates significantly during pregnancy may also need to discuss whether dialysis should begin. These decisions require specialist assessment rather than a single laboratory result or symptom.
How should you plan delivery and care after birth?
Discuss the birth plan with your maternity and kidney teams well before the expected delivery date. The timing and method of birth depend on several factors, including kidney function, blood pressure, the baby's growth, and whether pregnancy complications develop. CKD does not automatically mean that a caesarean birth is necessary; vaginal birth may be possible when there is no obstetric reason to choose another approach.
NICE guidance on intrapartum care for people with existing medical conditions recommends specialist input and early planning for delivery in people with advanced, progressive, or active kidney disease. The care team may also plan monitoring of blood pressure, fluid intake and output, and kidney function during labour and immediately after birth, according to individual needs.
Follow-up remains important after delivery because blood pressure and kidney function can change during the postpartum period. Your clinicians should review your recovery, repeat relevant blood and urine tests when appropriate, and reconsider your medicines and treatment targets. If you plan to breastfeed, ask for a medication review to confirm which treatments are compatible with breastfeeding. Arrange a clear follow-up plan with both your kidney specialist and primary maternity or postpartum care team.