Lillian is 50 years old. her doctor has noticed a sharp decrease in her estrogen levels, and lillian is complaining about nausea and fatigue. according to the symptoms given in the text, what could be her initial diagnosis?

The initial diagnosis for Lillian, who is 50 years old and has sharp decrease in her estrogen level, nausea and fatigue is Menopause. Menopause is a natural biological process that marks the end of your menstrual cycles. There are hormonal changes during this phase, characterized with decrease in estrogen. The hormonal changes also lead to fatigue and nausea, which are common symptoms of menopause.