On the road to health, women are hot and cold.

In this issue, Professor Yu Qi from Peking Union Medical College Hospital is invited to interpret the protective umbrella of women-estrogen. Women secrete estrogen from adolescence. He Jia, MD, demonstrated the source of female estrogen. Experts suggest that too much estrogen will lead to endometrial cancer in women, and too little estrogen will lead to premature aging in young women.