although the reasons given have only recently been discovered
the information is actually not that new,sadly for man the Nazi's experiments on women under duress is still used as is the data on twins , stress , cold and countless other "medical experiments" conducted in the so called name of science.

in the studies on women it was found that stress,that is the threat of death, actually changed the menstrual cycle.this is attributed to the preservation of the species,breed first then die.

the scientific community although condeming the testing done still refer to and use the data collected in the death camps