Its because different dosages and brands of pill last longer in the body, so the longer the hormones stay in your body the longer it will be until the hormone levels fall enough to cause a withdrawal bleed. Also, irregular/missed/breakthrough bleeds are all common when starting a new pill...
If the contraceptive pill isn't working for you – either because of its side effects, or simply because you're terrible at remembering to take it every day – it could be worth switching to the injection. A doctor shares her advice...
In sub-Saharan Africa, an estimated 25% of women and couples who want to space or limit their births are not using any form of contraception. Because more than half of Africa’s population is under the age of 25, unmet need for family planning is likely to rise as these individuals ...