The pill, IUDs, the implant and the injection often change your periods, especially in the first 3 to 6 months. After that, periods often get lighter or less frequent, and on some methods they stop altogether. You choose a method with your doctor. Knowing what to expect means the changes won't scare you.
Is the bleed on the pill a real period?
Not quite. The combined pill, patch and ring stop ovulation, so you don't have your usual cycle on them. The bleeding during the break or on the inactive pills is called a withdrawal bleed. It's your body's response to a few days without hormones.
It's usually lighter and less painful than your old periods. The mini pill has no oestrogen and is taken without a break. Bleeding on it may come more often, get lighter, or stop altogether.
What happens in the first few months?
Many people get light bleeding between periods at first: for a few months on the pill, and for 3 to 6 months with a hormonal IUD. It usually settles down within that time. On the implant, periods change very often and in different ways: they may get lighter or heavier, longer, irregular, or stop.
While your body adjusts, keep a panty liner in your bag and log the bleeding days in your calendar. If bleeding still bothers you after 3 months on the pill, your doctor can suggest a different pill or taking it without breaks.
The copper IUD has no hormones, and in the first months your periods may get heavier, longer and more painful. This can ease over time, and ordinary over-the-counter painkillers help with the pain.
Does the pill make it harder to get pregnant later?
No, that's a myth. Fertility comes back straight away after an IUD or implant is removed, and usually about a month after stopping the pill. The injection takes the longest: up to a year.
You don't need breaks "to let your body rest" either. Taking the pill back to back is safe, and a break that isn't in your schedule lowers your protection against pregnancy.
Common questions
I haven't had a period for months. Is that dangerous?
With a hormonal IUD, the implant, the injection or the pill taken without breaks, this can happen, and it's safe. If you missed pills and had sex, take a pregnancy test at least 21 days after you had sex. If you're not using contraception and haven't had a period for 3 months, see a doctor.
Will the pill make me gain weight?
There's no evidence that the combined pill causes weight gain. With the contraceptive injection, though, weight gain is a common side effect.
Can contraception affect my mood?
For some people, yes: mood changes are among the side effects people report. Track how you feel in your calendar. Notes make the talk with your doctor more concrete, and you can switch methods.
Do the pill or an IUD protect against infections?
No. Neither hormonal methods nor IUDs protect against STIs. Condoms do, and you can use them alongside any method.
In short
- Keep a panty liner in your bag for the first few months
- Log bleeding days to see whether they're settling down
- Use condoms against STIs, whatever your method
Source: NHS: Contraception
Educational content; it does not replace professional medical advice.