if you always experience a lack of periods (amenorrhea) when your weight drops below a certain point then that is a sign that your lower weight is not enough to sustain normal periods. while estrogen often decreases when body fat and weight dips too low that may not always be the case. the female body needs a certain percentage of body fat to allow the hormones to work properly. this mixed with strenuous exercise and perhaps a diet lacking in key nutrients and calories is enough to keep your body from having periods. my suggestion to you is to see a registered dietitian who specializes in sports nutrition. they can look at your diet activity level and weight and provide recommendations to stay healthy which includes regular periods. you can find a dietitian near you at eatright. org. good luck and take care of yourself!
seconday amenorrhea with normal hormone panel. i am a female athlete with low body fat. when i hit a certain weight i always experience secondary amenorrhea. as i have been below this weight for a significant amount of time i have not had a period in 1. 5 years. i did a full hormone panel and all tests were normal. how can all my hormone levels be normal yet i am not menstrating? i have spoken with two doctors and they cannot explain this to me. additionally i have no other symptoms (i. e. acne increased hair growth etc).