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 menopause, women experience hormonal and chemical changes. There is a decrease in a woman's level of estradiol, the principal estrogen of women. Also, some serotonin functioning decreases although it is unknown the extent to which serotonin and norepinephrine activity is affected by menopause.