No it cannot. I can only speak for the UK but if you are not well enough to donate blood then they will not take it.
If you are having problems with periods then maybe you should see a doctor or seek further advice here, explaining the problem.
Hope this helps.
No. Menstrual blood comes from the breakdown of the lining of the womb and not from the general bloodstream.
NO,YOUR PERIOD START BECAUSE YOUR OVARIES SEND A SIGNAL
No. They are completely unrelated.
Yes. Stress can cause you to miss your period.
no
Xanax (alprazolam) will not cause missed or late periods.
Yes! Being ill can cause you to be more stressed and cause you to miss your period. There are several reasons you may skip a period.
Yes excessive working out or extreme weightloss can cause you to miss a period.
No - stress or other issues may cause your period to be delayed a day or so but not miss a period altogether. ok if you missed your period one month do not worry just be happy
No prenatal vitamins do not cause you to miss your period - they are vitamins, thus have no influence on your menstrual cycle. Consider that if prenatal vitamins did cause you to miss your period (which would only happen if you missed ovulation) then they would prevent pregnancy, this work against those who were taking them!
you may be pregnant!
no
Not necessarily although sometimes inadequate nutrition (vegetarian or not) can cause one to miss a period.
Pregnancy
if you are pregnant it can cause you to miss some periods