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.
During and after menopause, women experience a drop in estrogen levels, as well as a shift in the balance of estrogens that the body produces. Before menopause, the ovaries produce the main source of estrogen, and the main type of estrogen produced is known as estradiol. After menopause, the main source of estrogen is androstenedione, which is produced by the adrenal gland and is converted into an estrogen known as estrone. Menopausal symptoms and changes result from the decrease in estrogen and the shift from estradiol to estrone.