1 There are large areas of tundra in northern North America, northern Europe, and northern Asia. 2  The word tundra comes from a Finnish word tunturi, which means treeless plain or barren land. 3  The tundra is a very fragile biome that is shrinking as the permafrost melts. There are large areas of tundra in northern North America, northern Europe, and northern Asia. 2  The word tundra comes from a Finnish word tunturi, which means treeless plain or barren land. 3  The tundra is a very fragile biome that is shrinking as the permafrost melts.
1 Other possible symptoms of early pregnancy include mood changes, increased urination, headaches, low backache, breast tenderness, darkened areolas, fatigue, nausea, and implantation bleeding. 2  Symptoms of late pregnancy can include leg swelling, backache, heartburn, leakage of urine, and shortness of breath.
Other signs of pregnancy that women reported by 8 weeks include: 1  Mild uterine cramping or discomfort (without bleeding). 2  Abdominal bloating. 3  Constipation. 4  Heartburn. 5  Nasal congestion. 6  Shortness of breath. 7  Food cravings or aversions. 8  Lightheadedness. 9  Spider veins. 10  Itchy palms. 11  Areas of darker skin (on the face, abdomen, or areolas).