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.
1 Nausea and vomiting, sometimes known as  morning sickness  typically begins in the 2nd to 8th week of pregnancy. 2  Other possible early pregnancy symptoms are mood swings, fatigue, changes in skin pigmentation, frequent urination, and headache. Not all women will experience the same symptoms in early pregnancy or experience these symptoms to the same degree. 2  Feelings of breast swelling, tenderness, or pain are also commonly associated with early pregnancy. 3  There is usually only a small amount of weight gain in the first trimester of pregnancy.