BEST GUM SPECIALIST IN CHENNAI? Pregnancy gingivitis is caused by an increase in estrogen and progesterone levels. These are essential hormones that help the fetus grow and develop, but they also cause many changes to your body. One of these changes is increased inflammation of your gums. Although the exact way this happens isn’t clear, healthcare providers think it may be due to: Decreased ability of your body to respond to plaque bacteria. Increased blood flow to the gum tissue. It’s a result of hormonal changes in the body which can lead to irritated and bleeding gums. If you notice gum inflammation, contact us at Apple Dental for a visit before it causes any further issue as it can be stopped in its tracks.