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.
With morning sickness, some women are sick (vomit) and some have a feeling of sickness (nausea) without being sick. The term morning sickness is misleading. It can affect you at any time of the day or night, and some women feel sick all day long. It's thought hormonal changes in the first 12 weeks of pregnancy are probably one of the causes of morning sickness. Symptoms should ease as your pregnancy progresses.