Contraception and hormones, beyond pregnancy

A substantial proportion of hormonal contraception is prescribed at least partly for something other than preventing pregnancy, which changes how the risks and benefits should be weighed.

The non-contraceptive uses

Heavy menstrual bleeding, where the hormonal intrauterine device is first-line treatment in several guidelines and is more effective than tablets.

Painful periods, where hormonal methods reduce prostaglandin-driven cramping.

Endometriosis symptom management.

Premenstrual dysphoric disorder, where continuous combined regimens have specific evidence.

Acne and hirsutism, where combined methods reduce free androgens.

Polycystic ovary syndrome, for cycle regulation and endometrial protection.

Menstrual migraine management in appropriate cases.

Perimenopausal symptom control.

And simply not wanting periods, which is a legitimate reason on its own.

The documented benefits

Beyond symptom control, some of which are substantial and rarely mentioned.

Combined hormonal contraception is associated with reduced risk of ovarian and endometrial cancer, with the protection persisting for years after stopping and increasing with duration of use.

Reduced risk of colorectal cancer appears in some analyses.

Reduced benign breast disease and ovarian cysts.

Reduced iron deficiency anaemia through lighter bleeding, which matters considerably at population level.

These sit alongside the risks and are frequently omitted from the conversation entirely, which makes for an unbalanced decision.

The risks, stated accurately

Combined methods increase venous thromboembolism risk, by a factor that sounds alarming in relative terms and remains small in absolute terms — and is lower than the risk in pregnancy and the postpartum period, which is the relevant comparison for someone choosing between contraception and no contraception.

Risk varies by progestogen type and is higher with certain formulations.

Transdermal and vaginal routes do not remove this risk, unlike hormone therapy at menopause where the route matters.

Combined methods are contraindicated with migraine with aura because of stroke risk, which is an important and specific rule.

A small increase in breast cancer risk with current use has been found in large studies, declining after stopping.

Cervical cancer risk shows a small increase with long duration of use, confounded by sexual behaviour and screening patterns.

Progestogen-only methods carry a different and generally more permissive profile, which is why they are options for people who cannot use oestrogen.

Mood

The most commonly reported and most contested effect.

A large registry study found an association between hormonal contraception use and subsequent antidepressant prescription, particularly in adolescents.

Randomised trial evidence has been more mixed, with some trials finding small effects on mood and wellbeing.

The honest position is that a subset of users experience genuine mood effects, that this is not universal, that it cannot currently be predicted in advance, and that dismissing individual reports because the population evidence is mixed is poor practice.

The practical response is to note timing, try a different formulation or method, and take the person's own observation seriously.

What happens on stopping

Frequently misunderstood.

Fertility returns quickly with most methods — immediately with the intrauterine device, implant and most pills — with the injection being the exception and taking up to a year.

There is no need to allow a washout period before conceiving, contrary to common belief.

The underlying condition returns: acne, heavy bleeding, pain and irregular cycles come back because the contraception was suppressing them rather than treating them.

And a period of irregularity while cycles re-establish is normal, though absence of periods beyond a few months warrants assessment.

Choosing when it is not about pregnancy

The questions shift.

What is the primary symptom being treated, since different methods suit different problems — an intrauterine device for bleeding, a combined method for acne and androgen symptoms.

Is contraception also needed, which affects whether a non-contraceptive alternative might be better.

What non-hormonal options exist for the same problem, since tranexamic acid, non-steroidal anti-inflammatories and other treatments are effective for some indications.

And what the person's own risk profile is, which determines what is safe rather than what is ideal.

General information only, not medical advice. Guidance varies by country — discuss contraception and its alternatives with a qualified clinician who knows your history.