Are dark under eye circles a sign of pregnancy?

While dark under-eye circles are common during pregnancy, they are not a reliable indicator of pregnancy. Dark circles under the eyes are often caused by the temporary effects of hormonal changes or sleep disruption, which are not specific to pregnancy. They can be caused by a variety of factors such as aging, genetics, fatigue, nutrient deficiencies, sun damage, allergies, and certain medical conditions. If you're concerned about any changes you see in your body during pregnancy, it's always best to consult with a doctor for an accurate assessment and guidance.