Click on the cross to close the popups

Is it normal for period blood to be really dark after starting a new birth control?

I think the different levels of hormones in birth control can affect how your period is. I would see what Dr. Molly has to say about specifics when it comes to this though. She would know much more about this sort of thing.

Hormone changes can certainly lead to changes in period color (or length, or heaviness, and so on!). So, while it's certainly possible, darker period blood is not a birth control side effect that I've heard of before. It sounds like a great question to ask the healthcare professional who prescribed the birth control. In the meantime, you might want to check out this article about birth control and possible side effects.


It can be. When you start a new birth control pill, it may have different hormonal effects and as a result the uterine lining may not build up as thickly as it has in the past. In addition, the hormones of your new pill may withdraw differently, and as a result the lining may slough off more slowly. Dark blood is old blood and the slower the lining sloughs off, the longer it takes for that little trickle of blood to get out through the vagina. The longer it takes, the older and darker the flow will be as a result. Depending on your body’s response to the hormones in the pill, you may never get a thick enough uterine lining to slough quickly and get red blood. Whether your menstrual flow is red or brown, it still counts as your period.

Related Articles

Default Image
Default Image

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.

Recommended Products

UbyKotex 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. 

View Product

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.

View Product

Click® Tampons Super Compact

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!

View Product

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.

View Product