During adulthood, what hormonal change often occurs in women?

The hormonal change that often occurs in women during adulthood is a decrease in sex hormones, particularly as they approach menopause. Throughout a woman's life, estrogen and progesterone levels fluctuate due to menstrual cycles, but as they age, the production of these hormones gradually declines. This decrease in reproductive hormones is a natural part of aging and leads to various physiological changes that can affect health, mood, and reproductive capabilities.

In the context of adulthood, women may experience symptoms related to declining estrogen levels, such as hot flashes, irregular periods, and changes in mood. This is a significant aspect of women's health and is widely studied in the fields of endocrinology and gynecology.

Other choices reflect different aspects of hormonal changes but do not specifically capture the primary and well-documented change that women experience during adulthood and especially leading into menopause. While certain hormone levels may remain stable or even increase, the notable trend across many women is the decrease in sex hormones, making this the most accurate answer.