According to WebMD, common pregnancy symptoms include missed menstrual periods, breast tenderness, morning sickness and fatigue. Another common symptom that often goes unnoticed is implantation bleeding. Implantation bleeding occurs within 12 days following fertilization, and symptoms include cramping and light spotting. Implantation is often mistaken for pre-menstrual symptoms. Additional signs of pregnancy include headaches and constipation.
The American Pregnancy Association explains that early pregnancy symptoms, such as lower back pain and nausea, can mimic symptoms of other conditions, such as hormone imbalances and illness, so it is important for any woman who believes she might be pregnant to take a pregnancy test.
According to Baby Zone, in addition to common symptoms, such as nausea and exhaustion, many pregnant women experience a variety of uncommon symptoms, such as food aversions, excessive hair growth on the abdomen and face, excessive saliva, nose swelling and darkening of the skin. Pregnancy can also cause dental issues, such as bleeding gums and painful bumps on the gums, called pyogenic granulomas, that bleed easily. It is important for pregnant women to continue brushing and flossing regardless of pain and bleeding as tooth decay causes additional bacterial build up that can harm an unborn child. Practicing excellent oral hygiene during pregnancy can help to minimize symptoms.