Forests are essential for life on earth. Three hundred million people worldwide live in forests and 1.6 billion depend on them for their livelihoods. Forests also provide habitat for a vast array of plants and animals, many of which are still undiscovered. They protect our watersheds.
The other cause is migraine headaches that can affect some women prior to their period following ovulation. Nausea typically accompanies migraines regardless of the cause of the headache. In this case the headaches are caused by the hormonal imbalance and they can be completely debilitating along with the nausea.
Many doctors believe that a long duration of significantly increased levels of estrogen, followed by a sudden drop in hormones, such as the time just before menopause, will cause more severe headaches than even menstrual headaches. While the reason hormonal fluctuations cause headaches during menopause is still inconclusive, most researchers agree it has to do with the effects that hormones, such as estrogen and progesterone, have on the brain and its blood vessels.