# Heartburn at 25 Weeks Pregnant

Source: https://www.pregnancypowerhour.com/pregnancy/symptoms/heartburn-week-25
Last updated: 2026-07-01

> At 25 weeks pregnant, heartburn often emerges or intensifies as your growing uterus begins to press upward, leading to uncomfortable acid reflux.

As you navigate week 25 of your pregnancy, you might find yourself experiencing a new sensation: heartburn, often described as a burning feeling in your chest. This isn't uncommon, and for many, this stage marks when it truly begins to make its presence known. The primary reason for this shift at 25 weeks is a combination of your body's natural hormonal changes and the physical growth of your baby and uterus. Your body is working hard, and part of that involves an increase in progesterone, a hormone that plays a vital role in maintaining your pregnancy. However, progesterone also has a relaxing effect on smooth muscles throughout your body, including the lower esophageal sphincter—the valve that separates your esophagus from your stomach. When this sphincter relaxes, it can allow stomach acid to more easily flow back up, creating that familiar burning sensation.

Adding to this, at 25 weeks, your uterus is expanding significantly, beginning to push upward and exert pressure on your stomach. This physical compression can further encourage stomach acid to reflux into the esophagus, especially when you're lying flat. It's a common experience, affecting a significant number of pregnancies, and while uncomfortable, it's generally a mild symptom that can be managed with informed choices. Understanding these physiological changes can bring a sense of clarity, helping you approach this symptom with confidence rather than confusion. You get to decide how to best support your body through these shifts, and there are several evidence-based options to explore.

While heartburn can be a persistent companion through the second and third trimesters, knowing what's happening within your body can empower you to make practical adjustments. For instance, paying attention to how certain foods or positions affect you can be a helpful first step. Just as your body is adapting in new ways, perhaps with changes in vaginal discharge that some might notice around [Yeast Infection Symptoms in Pregnancy at 12 Weeks Pregnant](/pregnancy/symptoms/yeast-infection-symptoms-week-12) or even later, like [Yeast Infection Symptoms in Pregnancy at 17 Weeks Pregnant](/pregnancy/symptoms/yeast-infection-symptoms-week-17), the digestive system is also undergoing its own set of adjustments. Focusing on gentle, supportive approaches can make a real difference. Remember, this is a collaborative process between you and your body, and understanding the 'why' behind these sensations is a powerful tool.

Many find that small, consistent changes can offer significant relief. It's about finding what brings ease to your unique situation. Just as you might be mindful of other bodily changes, perhaps even noticing shifts that prompt questions about symptoms like those discussed in [Yeast Infection Symptoms in Pregnancy at 15 Weeks Pregnant](/pregnancy/symptoms/yeast-infection-symptoms-week-15), managing heartburn involves gentle observation and practical responses. Your care provider is your best resource for your specific situation, and they can offer personalized guidance on any discomforts you're experiencing.