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.
Feeling sick during pregnancy. You may feel sick and nauseous, and/or vomit. This is commonly known as morning sickness, but it can happen at any time of the day or night. For most women who have morning sickness, the symptoms start around six weeks after their last period. Read more about coping with nausea and morning sickness in pregnancy.