What is the term for low estrogen associated with menopause and its effects on the body?

The term "hypoestrogenism" refers to a state of low estrogen levels in the body. During menopause, the ovaries significantly decrease the production of estrogen, leading to various physiological changes and symptoms such as hot flashes, night sweats, and vaginal dryness. The use of "hypoestrogenism" captures the essence of the condition itself—it specifically denotes the deficiency of estrogen without attributing it solely to menopause or any other specific causes.

While the other options reference the decrease in estrogen or conditions related to it, they either include additional descriptors or contexts that make them less direct. For instance, "menopause-associated hypoestrogenism" specifies the condition as a result of menopause, and "postmenopausal estrogen decline" focuses on the timing rather than the condition itself. "Estrogen deficiency syndrome" adds a broader perspective that may imply a collection of symptoms or a syndrome rather than directly naming the underlying hormonal deficiency. "Hypoestrogenism," in its simplest form, effectively conveys the state of low estrogen that is central to understanding menopausal changes.