Tiredness is natural during pregnancy. In the firts trimester because of the energy required and later as it is harder to carry around the extra weight of your growing baby. Maintaining a good fitness routine will help throughout your pregnancy.
tiredness and pregnancy are related by the simple fact that the energy that once was stored for you, is now also being used by the growing fetus inside you.
Most women are very tired during the first trimester and the end of the third trimester. There isn't much you can do other than to get rest. It will pass.
