I have never experienced this before! It seemed unlikely to me that losing a little bit of the blood pumping around in your body could affect your uterine lining, which is a little different. But since I’m not a professional, I’ll defer to what our expert has to say on the matter!
I think missing your period after donating blood is more anecdotal than factual. The fluid that you lose during your period is the lining of your uterus that has been thickening but is not needed, so it really doesn’t have anything to do with any blood you may donate. And that’s why we have medical experts here, so be sure to read what Sandy has to say.
Thank you for donating blood -- our supply is always in need of generous donors like you! Donating is probably not the specific cause of your period being late. Although because it is true that stress (physical or emotional) can definitely lead to a late period, I would say that it could be a contributing factor. Other things to consider are changes in sleep, diet, physical exercise, infections, other hormone imbalances, and (like you alluded to) pregnancy. It is not too unusual to have a late period once in a while, but if it becomes a pattern, your PMS symptoms continue or you are more than a few weeks late, make an appointment to discuss with your healthcare provider.
This is not intended to be medical advice. Everybody is different so please make sure to consult your physician if you're having issues. Do not delay or refrain from seeking professional medical advice from your physician because of something you have read on this site.
No matter what time of the month it is, U by Kotex® has something that's right for you.
Allnighter® Ultra-Thin Pads with Wings, Extra Heavy Overnight
U by Kotex® Allnighter® Ultra Thin Extra Heavy Overnight Pads with Wings provide up to 100% leak free protection and have an 80% larger back* for all night protection in any sleep position.
Security® Ultra-Thin Pads with Wings, Overnight
For all night protection in any sleep position, try U by Kotex® Security® Ultra Thin Overnight Pads with a 60% larger back*.
Teen® Ultra-Thin Pads with Wings, Overnight Protection
Get up to 100% leak free protection with U by Kotex® Ultra Thin Teen Overnight Pads with Wings.
Teen® Pads - Extra Absorbency
Check out these smaller-sized pad with heavy-flow absorbency. U by Kotex Teen® Pads are totally perfect for your younger girls learning the ropes and have vibrant colors with cool patterns.
Cleanwear® Ultra Thin Pads - Heavy Flow With Wings
Say hello to your new favorite pad for heavy flow days. U by Kotex® Cleanwear® Pads feature Xpress DRI® Core for crazy, fast absorption to help stop leaks.
Click® Tampons Super - Compact Applicator
Go from compact to full-sized protection in one quick move with U by Kotex® Click® Tampons. Perfect for travel and pocket-sized, to go where U go!
Security® Ultra Thin Pads - Long with Wings
This super-thin pad has some crazy fast absorption that you can trust. And with its added length and uniquely shaped wings. It'll keep you comfortable while helping stop leaks dead their in tracks.