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Your Period & Birth Control Before Surgery
Having your period is almost never a reason to cancel surgery, and most contraception is fine to continue. Here is what actually matters — plus a quick check of what your specific method might mean.
Having your period? Surgery can still go ahead
Bleeding from a period does not stop most operations, and it will not affect your anaesthetic. You do not need to delay or hide it.
- Tell the team when you arrive — a quick word with the nurse is all it takes.
- Bring supplies (pads or your usual products). Tampons or menstrual cups are often removed before theatre — staff can help and will give you pads.
- They have seen it all — there is nothing to be embarrassed about, and they can help with anything you need.
- One exception: some gynaecological procedures prefer a certain point in your cycle. If so, your team will tell you ahead of time.
Check your contraception
Pick the method you use to see the note that applies to it.
The golden rule
Never stop contraception on your own. If your team does advise pausing the combined pill, patch or ring, arrange a reliable backup (such as condoms) for the whole gap and until they say it is safe to restart. The decision is individual — it balances a small clot risk against the real risk of an unplanned pregnancy, so make it together with your team.
Frequently asked questions
Will my period get my surgery cancelled?
Almost never. Bleeding from a period does not stop most operations going ahead. Just tell the nursing team when you arrive so they can give you pads or other supplies and look after you. Period blood also will not affect your anaesthetic. The main exception is some specific gynaecological procedures, where the team may prefer a particular point in your cycle — they will tell you in advance if so.
Do I need to stop my birth control before surgery?
It depends on the method and the operation. Combined hormonal contraception — the pill, patch or vaginal ring that contains oestrogen — slightly raises the risk of a blood clot, so for some bigger or higher-risk operations the team may ask you to stop it about four weeks beforehand and use another form of contraception. Progestogen-only methods (mini-pill, implant, injection) and IUDs (copper or hormonal coils) are generally fine to continue. Never stop on your own — ask your team and arrange a backup first.
Why four weeks before for the combined pill?
It takes roughly four weeks after stopping oestrogen-containing contraception for the small extra clot risk to settle, which is why any planned stop is timed well ahead rather than a day or two before surgery. Whether you need to stop at all depends on how big the operation is, how mobile you will be afterwards, and your own clot risk — so it is an individual decision made with your team.
Will I have a pregnancy test before surgery?
A pregnancy test is routine for anyone who could be pregnant, usually from a urine sample on the day. This is a standard safety check, not a judgement — knowing protects you and any pregnancy from medicines, X-rays and the anaesthetic. Tell the team the date of your last period and any chance you might be pregnant.