Author Henry David Thoreau was among those who spoke out in defense of John Brown after his arrest following the Harpers Ferry raid. Thoreau penned an essay, âA Plea for Captain John Brown,â in support of his fellow abolitionist.
1 The average age of U.S. women at the time of menopause is 51 years. 2  The most common age range at which women experience menopause is 48-55 years. 3  Premature menopause is defines as menopause occurring in a woman younger than 40 years. 4  About 1% of women experience premature menopause.
Menopause is defined as the absence of menstrual periods for 1 year. The average age of menopause is 51 years, but the normal range is 45 years to 55 years. The years leading up to this point are called perimenopause. This phase can last for up to 10 years. During perimenopause, shifts in hormone levels can affect ovulation and cause changes in the menstrual cycle.