Pregnancy brings so many changes to a woman’s body some expected, some completely surprising. One thing most pregnant women never think about is kidney stones. And honestly, why would they? But kidney stones during pregnancy are more real than most people realise, and when they do occur, they need careful attention for the health of both the mother and the baby.
The good news is that with the right diagnosis and treatment, kidney stones in pregnancy can be managed safely.
How Common Are Kidney Stones During Pregnancy?
Kidney stones during pregnancy are not very common, but they are not unheard of either. When they do occur, they are most often seen during the second or third trimester. The tricky part is that some symptoms of kidney stones – like back pain, nausea, and frequent urination – can easily be mistaken for normal pregnancy discomfort. This is why correct and proper diagnosis is so important.
Leaving kidney stones untreated during pregnancy can lead to serious complications, including premature labour. So if something feels off, it is always worth checking with your doctor.
What Causes Kidney Stones During Pregnancy?
Pregnancy causes significant changes in a woman’s body, and some of these changes directly affect the urinary tract and kidneys. Here are the main reasons why kidney stones can form during pregnancy:
1. Changes in the Urinary Tract
As the baby grows, the uterus gets larger and starts pressing against the ureters — the tubes that carry urine from the kidneys to the bladder. This pressure can slow down or partially block the flow of urine. When urine cannot drain properly, minerals begin to collect and crystals start forming inside the kidneys.
2. Dilated Ureters
During pregnancy, the ureters naturally stretch and widen. While this is a normal body response, it means urine does not move through as efficiently as it normally would. When urine stays inside the urinary tract longer than it should, the risk of both kidney stones and urinary tract infections increases.
3. Changes in Calcium Handling
The body goes through significant vitamin and mineral changes during pregnancy. One of the most important is how the body handles calcium. During pregnancy, the body tends to absorb more calcium but does not always process it effectively. This excess calcium then passes into the urine — and when urine calcium levels are too high, kidney stones can form.
These changes typically begin in the second trimester and usually improve after delivery.
How Do Kidney Stones Affect Pregnancy?
This is the part that concerns most mothers the most and rightly so.
Untreated kidney stones during pregnancy can:
- Trigger premature labour or early delivery
- Interfere with normal labour and delivery
- Cause severe pain and dehydration
- Lead to urinary tract infections that can become dangerous during pregnancy
- Pose a direct health risk to the baby
This is why early detection and timely treatment are absolutely critical. Do not wait and hope the pain goes away on its own.
Treatment of Kidney Stones During Pregnancy
Treatment during pregnancy has to be handled very carefully. Doctors always aim for the safest option that protects both mother and baby. There are two main categories of treatment – non-invasive and invasive.
Non-Invasive Treatment (Without Surgery)
For most pregnant women, especially when stones are small, conservative treatment works well. Around 70 to 80 percent of kidney stones pass on their own with this approach. It typically includes:
- Complete bed rest
- Drinking plenty of fluids to help flush out the stone naturally
- Prescribed medications to manage pain and support the urinary tract
This is always the first choice because it involves no surgery and carries minimal risk for the baby.
Invasive Treatment (When Surgery Is Needed)
When the stone is too large to pass on its own or is causing serious complications, doctors may need to step in with a procedure. The two most common options are:
Stenting: A small tube called a stent or PCN tube is placed inside the ureter. This tube helps urine drain properly past the blockage, reducing pressure and pain. The stent is generally kept in place until after delivery and removed once it is safe to do so.
Ureteroscopic Stone Removal (URS): This is the most recommended surgical procedure for pregnant women who need stone removal. A thin instrument is passed through the urinary tract to locate and remove the stone. A special laser called Holmium laser is used to break the stone into smaller pieces so it can be safely removed. This procedure is considered safe during pregnancy and is preferred over other methods.
What Should You Do If You Suspect Kidney Stones During Pregnancy?
If you are pregnant and experiencing any of the following, speak to your doctor immediately:
- Severe back or side pain that does not go away
- Pain while urinating
- Blood in urine – pink, red, or brown coloured urine
- Nausea and vomiting beyond typical morning sickness
- Fever and chills
- Frequent urge to urinate with little output
Do not try to self-diagnose or manage the pain at home without medical advice. Kidney stones during pregnancy need proper evaluation by a urologist and obstetrician who can work together to find the safest treatment plan for you.
Conclusion
Kidney stones in pregnancy are rare, but they are serious. The changes your body goes through during pregnancy – from urine flow slowdowns to calcium processing changes – can all contribute to stone formation. The key is not to ignore the symptoms.
With the right medical support, kidney stones during pregnancy can be treated safely without harming your baby. Early diagnosis, proper hydration, and timely treatment make all the difference. If you have any concerns, always reach out to a specialist who has experience treating pregnant women with kidney stones -because both you and your baby deserve the best possible care.
