According to an observational study published in the European Heart Journal, early menopause before the age of 40 was associated with a higher risk of heart failure and atrial fibrillation[2][3]. The study included the health data of more than 1.4 million women[1][2][3]. A total of 28,111 women (2%) had a history of premature menopause with an average age of onset of 36.7 years[1]. During a mean follow-up of 9.1 years, 42,699 women (3%) developed heart failure and 44,834 women (3.2%) developed atrial fibrillation[1][2][3]. Women with early menopause had a 33% higher risk of heart failure and a 9% higher risk of atrial fibrillation compared to women with later menopause[1][2][3]. Compared to menopausal women aged 50 years and older, women who menopausal before 40 years had a 39% higher risk of heart failure and an 11% higher risk of atrial fibrillation[1][2][3]. The younger the age of onset of menopause, the higher the risk of these heart problems[1][2][3].