Pregnant women can drink small amounts of black coffee occasionally, there is no evidence that black coffee will have an effect on the fetus, but a large amount of black coffee consumption may lead to adverse consequences such as preterm miscarriage and preterm labor. Drinking a small amount of black coffee occasionally can promote gastrointestinal peristalsis and relieve the symptoms of constipation during pregnancy. However, it should not be drunk in large quantities. Coffee contains a large amount of caffeine, which can cause uterine contractions, triggering frequent movements of the fetus, and may even lead to premature abortion and preterm labor. If sugar is added to black coffee, drinking a large amount of it will cause pregnant women’s blood sugar to rise, especially pregnant women with gestational diabetes should not drink it, which is not conducive to the health of pregnant women and the fetus during pregnancy. Pregnant women should have a healthy and balanced diet during pregnancy and eat small meals. If you experience discomfort after drinking coffee, it is recommended that you seek medical attention in a timely manner.