What are the reasons for early menopause?

Early menopause can be caused by several factors, including: 

• Genetics: Family history of early menopause. 
• Autoimmune disorders: Conditions where the immune system attacks the ovaries. 
• Chemotherapy or radiation: Cancer treatments affecting ovarian function. 
• Surgical removal: Hysterectomy or oophorectomy. 
• Chromosomal abnormalities: Such as Turner syndrome. 
• Lifestyle factors: Smoking and excessive alcohol use.