Modern arrow with plastic fletchings and nock. An arrow is a shafted projectile that is shot with a bow. It predates recorded history and is common to most cultures. An arrow usually consists of a shaft with an arrowhead attached to the front end, with fletchings and a nock at the other.
While estrogen levels will decrease during menopause, the truth is, estrogen levels do not fall appreciably until after a womanâs last period. In fact, far more women suffer from the effects of âestrogen dominanceâ during the transition â that is, they have too much estrogen relative to progesterone. And some women can suffer from the symptoms of estrogen dominance for 10 to 15 years, beginning as early as age 35.
The exact connection between the menopause and headaches is somewhat unclear. However, much of the blame can be placed upon the hormonal changes that the body goes through during the menopause. The hormones that are affected the most during the menopause are oestrogen and progesterone. Oestrogen is thought to cause blood vessels to dilate, while progesterone causes them to tighten. As the level of these hormones fluctuates, the blood vessels are constantly expanding and contracting.