Trees Provide Habitat for Wildlife. It is only natural that wherever trees are planted, wildlife and other plants are sure to follow. Trees provide shelter and food for a variety of birds and small animals, such as squirrels and beavers.
The only real medical reason you could be unusually tired during your period is if you have anemia, which is an iron deficiency. For some women who are anemic and have a very heavy period, the first day can be a doozy. However, this group is in the minority.
Menstrual Nausea Caused By Pain. The next possible cause of nausea in a woman during a period is pain, which is mainly pain in her lower abdomen. For a woman suffering from a painful period, which is referred to as dysmenorrhea; nothing might feel right.