A dangerous heart rate for a woman or a person assigned female at birth is generally considered to be above 100 beats per minute at rest or less than 60 beats per minute at rest. However, its important to note that whats considered a dangerous heart rate can depend on various factors, such as age, activity levels, and underlying medical conditions. If you experience a heart rate thats consistently outside of your normal range, especially if you have a history of heart disease or other medical conditions, you should consult with your healthcare provider.