Pregnancy brings many expected changes, from morning sickness and food cravings to aches and digestive discomfort. Because these symptoms are so common, it can be easy to dismiss pain in the upper abdomen or episodes of nausea as just another part of pregnancy. However, in some cases, these symptoms may be caused by gallstones, a condition that becomes more common during pregnancy due to hormonal and physical changes affecting the gallbladder.
While many gallstones remain harmless, others can trigger painful attacks or lead to complications that require medical attention. Understanding why gallstones develop during pregnancy, recognising the symptoms that should not be ignored and knowing when to seek medical assessment can help protect both your health and your pregnancy.
Why Are Gallstones More Common During Pregnancy?
Pregnancy increases the likelihood of developing gallstones because of hormonal and physical changes that affect how the gallbladder functions. The gallbladder stores bile, a digestive fluid produced by the liver that helps break down fats. Under normal circumstances, it contracts regularly to release bile into the small intestine. During pregnancy, however, these natural changes can slow this process, making gallstone formation more likely.
Hormonal Changes Slow Gallbladder Function
Higher levels of progesterone, a hormone essential for maintaining pregnancy, relax smooth muscles throughout the body, including the gallbladder. As a result, the gallbladder empties more slowly after meals, allowing bile to remain inside for longer. This increases the likelihood that substances in the bile, particularly cholesterol, will crystallise and gradually form gallstones.
At the same time, increased oestrogen levels can raise the amount of cholesterol in bile. When cholesterol exceeds what the bile can dissolve, crystals may develop and eventually grow into gallstones.
Additional Risk Factors During Pregnancy
Although any pregnant woman can develop gallstones, certain factors may further increase the risk, including:
- Being overweight or obese before pregnancy
- Rapid weight loss before or after pregnancy
- Having multiple pregnancies
- A family history of gallstones
- Being aged 40 years or older
- Having diabetes or other conditions that affect cholesterol metabolism
These factors can increase the concentration of cholesterol in bile or further reduce gallbladder emptying, making gallstone formation more likely.
Are Gallstones Always a Cause for Concern?
Not necessarily. Many gallstones do not cause symptoms and are only discovered incidentally during imaging performed for another reason. However, if a gallstone blocks the flow of bile, it can trigger sudden upper abdominal pain, inflammation or infection. Recognising the symptoms early and seeking medical assessment when they occur can help reduce the risk of complications during pregnancy.
What Symptoms of Gallstones During Pregnancy Should You Watch For?
Gallstones do not always cause symptoms, and many women remain unaware they have them throughout pregnancy. Problems usually arise when a gallstone blocks the flow of bile, leading to pain or inflammation. Because some symptoms can overlap with common pregnancy-related discomforts, it is important to recognise when they may indicate a gallbladder problem instead.
Common Symptoms of Gallstones During Pregnancy
Symptoms can range from mild to severe and may occur suddenly, particularly after eating a fatty meal. Common signs include:
- Pain in the upper right or centre of the abdomen
- Pain that may spread to the right shoulder or upper back
- Nausea and vomiting that is unrelated to morning sickness
- Bloating or indigestion after meals
- Episodes of pain lasting from several minutes to a few hours
These symptoms may occur as isolated attacks or recur over time if gallstones continue to obstruct the gallbladder.
Warning Signs That Need Prompt Medical Attention
Although many gallstones can be managed conservatively, some can lead to complications such as acute cholecystitis (gallbladder inflammation), bile duct obstruction or pancreatitis. Seek medical attention promptly if you experience:
- Severe or persistent abdominal pain
- Fever or chills
- Yellowing of the skin or eyes (jaundice)
- Dark urine or pale stools
- Persistent vomiting or an inability to keep fluids down
These symptoms may indicate a more serious condition that requires urgent assessment and treatment.
How Are Gallstones During Pregnancy Diagnosed and Managed?
Early assessment helps determine whether your symptoms are caused by gallstones or another pregnancy-related condition. Your doctor will recommend investigations and treatment based on the severity of your symptoms, how far along you are in your pregnancy and whether any complications are present.
How Are Gallstones Diagnosed During Pregnancy?
Diagnosis begins with a review of your symptoms and a physical examination, including assessing the location and nature of your abdominal pain.
Ultrasound
The first-line imaging test for detecting gallstones as it does not use radiation and is considered safe during pregnancy.
Blood Tests
To look for signs of infection, inflammation or blockage of the bile ducts by checking liver function and other relevant markers.
Additional Imaging
In selected cases, an MRI-based scan called magnetic resonance cholangiopancreatography (MRCP) may be recommended if a more detailed assessment of the bile ducts is needed. This avoids ionising radiation and may be considered when ultrasound findings are inconclusive.
These investigations help confirm the diagnosis and identify whether complications such as gallbladder inflammation or bile duct obstruction are present.
How Are Gallstones Managed During Pregnancy?
Treatment depends on whether the gallstones are causing symptoms and whether complications have developed.
For mild or occasional symptoms, conservative management is often appropriate and may include:
- Dietary modifications, such as avoiding high-fat foods that can trigger gallbladder attacks
- Adequate hydration
- Pregnancy-safe pain relief as recommended by your doctor
- Close monitoring to assess whether symptoms improve or recur
If gallstones cause recurrent attacks, severe symptoms or complications such as acute cholecystitis, bile duct obstruction or pancreatitis, more active treatment may be required. In selected cases, laparoscopic gallbladder removal (cholecystectomy) may be recommended during pregnancy when the benefits outweigh the risks. This procedure can often be performed safely during pregnancy when clinically indicated, particularly in the second trimester, although the timing is individualised based on both maternal and fetal considerations.
Seek Specialised Care for Gallstones During Pregnancy with Dr Wong Jen San
Gallstones during pregnancy can be concerning, but they are often manageable with timely medical assessment and appropriate treatment. While many gallstones remain symptom-free, persistent upper abdominal pain, recurrent attacks or signs of complications should not be ignored. Understanding the symptoms and seeking early evaluation can help ensure the most appropriate care while supporting the health and well-being of both mother and baby.
If you are experiencing symptoms that may be related to gallstones during pregnancy, our team at Hepatobiliary & Pancreatic Surgery Centre can provide a comprehensive assessment and personalised treatment recommendations based on your individual needs. Under the care of Dr Wong Jen San, you can receive guidance on the safest and most appropriate management options during pregnancy. Book an appointment today to discuss your symptoms and take the next step towards protecting your health and your pregnancy.
FAQs About Gallstones During Pregnancy
Meet Our Gallbladder Doctor in Singapore
Dr Wong Jen SanConsultant Hepatobiliary & Pancreatic SurgeonMBChB (UK), MMed (S'pore), MSc (S'pore), FRCS (Edin), FAMS
Dr Wong Jen San is a consultant hepatobiliary and pancreatic surgeon with expertise in the diagnosis and surgical management of conditions affecting the liver, pancreas, gallbladder, bile ducts, and digestive system. His clinical interests include hepatobiliary and pancreatic surgery, minimally invasive and robotic surgery, liver transplantation, gastrointestinal surgery, endoscopy, and general surgical procedures. Dr Wong is committed to providing evidence-based, patient-centred care tailored to each individual's condition and treatment needs.
is a Complex and Intricate One
