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.
Most women don't feel very different at 3 weeks, but some may notice a tiny bit of  implantation spotting  or feel early pregnancy symptoms such as fatigue, tender breasts, nausea, a heightened sense of smell, food aversions, and more frequent urination.That's counting eight weeks from the first day of their last menstrual period.) The results: 1  50 percent had some symptoms of pregnancy by the time they were 5 weeks pregnant. 2  70 percent had symptoms by 6 weeks.