21 reasons why your period may be late (if you’re definitely not pregnant!)

woman checking computer and internet for information on missed or late periods when not pregnant

by Catriona Watson |

As much as we hate periods and they quite often cause us pain and misery, it is sometimes nice to see mother nature doing is doing its job and your body is ticking along nicely. So when your menstrual cycle isn't regular or your period doesn't appear, it can be a bit worrying.

Read more: The early signs of pregnancy

If you're trying for a baby, a missed period is likely to make you assume you've been successful. But what happens if you've done a pregnancy test and it is negative?

Perhaps you know you can't be pregnant because you've just had a baby and are wondering why your periods haven't gone back to normal.

If you have missed a period but you're definitely not pregnant, there are lots of other less obvious factors or medical reasons that might be causing your late period...

21 reasons why your period might be late:

Gallery
View Gallery
21 photos
Miscalculation
1 of 21

1) Miscalculation

Some people’s periods are regular as clockwork and they know exactly when they are due but if you’re less certain it may be down to a simple miscalculation. An average menstrual cycle is 28 days but this varies, with some women having shorter cycles and some longer. Your cycle length or regularity may also change as you age. Track your periods with an app to give you a bit more clarity.

Could one of these reasons explain your missed period? Let us know on Facebook or Twitter!

Make sure you're following Mother & Baby on Instagram for relatable memes, inspiring stories and parenting hacks!

Have approx 60 seconds to spare? Why not join thousands of mums-to-be and start your very own Amazon baby wish list! They're absolutely free to create and perfect to send to the friends, aunties and your mum to make sure you're getting the baby products you really need...Click here!

Just so you know, whilst we may receive a commission or other compensation from the links on this website, we never allow this to influence product selections - read why you should trust us