Why is it easy for women over 40 to gain weight?

Metabolism, etc.: During lifespan women may face pregnancy, menopause, birth-control, pressure to lose weight & thus frustrating diets which can lead to weight gain due to metabolism shifts resulting in fat storage, & many other factors. Men tend to gain belly fat while women gain hip fat which is harder to lose. Healthy lifestyle with healthy food choices, fiber, sleep, exercise, and emotional calmness are helpful.