This is all about ovarian insufficiency from David Lora's blog

ovarian insufficiency, also known as primary ovarian insufficiency, occurs when the ovaries stop functioning properly before the age of 40. This condition can lead to irregular or absent menstrual periods, reduced fertility, and menopausal symptoms. Early diagnosis and treatment of ovarian insufficiency can help manage symptoms and improve quality of life. Many women with ovarian insufficiency benefit from hormone therapy and lifestyle changes to support their overall health.