"the effects of long water fasts on menstruation"?
Dr H M Shelton.........
"Both male and female organs are enabled to heal and repair themselves during a fast. Menstruation is often brought on a week or two weeks ahead of the regular time. After this it usually CEASES ALTOGETHER. Disorders of ovulation yield quite rapidly to the kindly influence of fasting.
Herbert Shelton also noted in his own patients that not only do some apparently healthy women, even in our own culture, never menstruate, but that non-menstruating women can be fertile and have healthy children. That is, ovulation does NOT require menstruation..........................
"The fact that the whole ovulation cycle can occur time after time without the loss of blood, and can and does this in so many cases, especially in women and whole tribes and races living 'less civilized', more natural lives, should cause us to doubt that menstruation is either necessary or normal. The fact that it is in the healthiest and strongest women that there is no loss of blood and that the loss of blood increases in proportion to the decline in physical vigor, should cause us to conclude that this, like all other losses of blood, is abnormal."
"Women can realize nothing but good from building such a high degree of health that this 'normal' hemorrhage becomes so 'abnormal' that it ceases."
I suggest you scroll down this webpage and read the article by Dr Shelton entitled..
"Should Women Menstruate? and published in the Hygienic Review Vol. IV May, 1943 No.9
Should Women Menstruate?