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.
For some women, going on birth control pills actually can reduce the nauseous feeling when they are having their period, as the pill will tend to level off those hormones during the monthly cycle. Another possible cause for nausea during a period is pain. For a woman who has a painful period, nothing might feel right. The prostaglandins that are released from the wall of the uterus during the menstrual period can cause painful contractions in the uterus.