(Image source from: Emergency contraceptive ineffective on overweight women})

Whether the rubber broke, you forgot to take your pill, miscalculated your ovulation cycle or just had unprotected sex - there can be ample instances when you might have to rush to your pill box for a morning-after to prevent unwanted pregnancy.

That said, while emergency contraception are effective, given you pop them anytime within 72 hours to 120 hours of having unprotected sex, know that a few morning-after pills come with a weight limit, meaning they are ineffective on women weighing more that 176 pounds. So weigh the consequences of your 'Plan B' before you pop one.

A recent study conducted by an American broadcast network revealed that some morning-after pills do not work on overweight women who are three times likelier to conceive than any other average weighing women.

Next time you are the counter to buy a morning-after, do not forget to inquire about the weight limit of your emergency contraceptive. That might make life easier for you later.

AW: Suchorita Dutta Choudhury