Hormonal Contraception and Mood — What the Evidence Actually Shows

More people take hormonal contraception than take any drug in the four medication classes we have already written about, and the question of what it does to mood has been argued over for sixty years. The honest answer turns out to be more interesting than either "it's all in your head" or "the pill causes depression" — because the observational evidence and the trial evidence point at two different conclusions, and both are right about different things.

We are not doctors or prescribers. Nothing here is a reason to stop contraception, which has consequences of its own. The last section is the one that matters most practically, because one of our own products contains an ingredient that can stop hormonal contraception working.

What hormonal contraception actually does

Your menstrual cycle runs on a feedback loop between the brain and the ovaries: the hypothalamus and pituitary release hormones that tell the ovaries to mature and release an egg, and the ovaries release oestrogen and progesterone, which feed back to the brain.

Hormonal contraception works by supplying synthetic hormones steadily enough that the brain reads the system as "already handled" and stops sending the ovulation signal. Combined methods use a synthetic oestrogen (usually ethinylestradiol) plus a progestin; progestin-only methods use the progestin alone, and work variously by suppressing ovulation, thickening cervical mucus and thinning the uterine lining.

Two details get skipped, and both matter for the mood question:

These are not your own hormones. Progestins are synthetic molecules designed to bind the progesterone receptor, and they differ substantially from one another — and from progesterone — in which other receptors they touch. Levonorgestrel, drospirenone, norethisterone and desogestrel are not interchangeable, which is one reason "the pill" is a category rather than a drug, and why someone can react badly to one and fine to another.

It does not regulate your cycle; it replaces it. A "period" on combined contraception is a withdrawal bleed from stopping the hormones, not a natural menstrual period. And because progesterone's metabolite allopregnanolone acts on the same GABAA receptor system that benzodiazepines act on, suppressing your own cycle changes neuroactive steroid signalling in the brain — which is the most plausible biological route by which any of this could affect mood at all.

The study that started the modern argument

In 2016, Skovlund and colleagues published a Danish national cohort in JAMA Psychiatry following 1,061,997 women and adolescents aged 15–34 for an average of 6.4 years, all with no prior depression diagnosis or antidepressant use.1 Compared with non-users, relative risks of a first antidepressant prescription were:

  • Combined oral contraceptives: 1.23 (95% CI 1.22–1.25)
  • Progestogen-only pills: 1.34 (1.27–1.40)
  • Levonorgestrel intrauterine system: 1.4 (1.31–1.42)
  • Vaginal ring: 1.6 (1.55–1.69)
  • Patch: 2.0 (1.76–2.18)

Risk decreased with age, and the signal was strongest in the youngest group. Adolescents aged 15–19 had a relative risk of 1.8 on combined pills and 2.2 on progestin-only pills. Risk peaked around six months after starting. Depression diagnoses showed similar or slightly lower estimates than antidepressant prescriptions.

A follow-up in the American Journal of Psychiatry in 2018 looked at nearly half a million women over 3.9 million person-years and found relative risks, versus never-users, of 1.97 (1.85–2.10) for suicide attempt and 3.08 (1.34–7.08) for suicide.2

Proportion matters enormously with that second finding, and it is usually reported without it. Those 3.9 million person-years contained 71 suicides in total. A tripling of a very small number is still a very small number, and the confidence interval — 1.34 to 7.08 — tells you how few events it rests on. The finding deserves to be known. It does not support the sentence "the pill triples your risk of suicide" as a statement about an individual person's year.

Three published reasons those numbers are probably too high

This is where most coverage stops. It shouldn't, because the methodological literature that came afterwards is the most interesting part.

1. Healthy user bias. A 2025 editorial in the British Journal of Psychiatry is devoted to the methodological obstacles in exactly this research, healthy user bias among them.3 The problem in outline: women who take hormonal contraception differ systematically from women who don't, in ways that registry data cannot fully capture — relationship status, sexual activity, how often they see a doctor. Someone who visits a GP to get a prescription is someone in contact with a system that also prescribes antidepressants.

2. Genetic confounding — and this one specifically undercuts the adolescent signal. A 2025 study in Acta Psychiatrica Scandinavica used polygenic scores in a Danish cohort to ask a sharp question: does genetic liability for mental illness predict when someone starts hormonal contraception?4 It does. Polygenic scores for major depression and for ADHD were each associated with starting between ages 10 and 14 at a hazard ratio of 1.21 (95% CI 1.16–1.27, p ≈ 10−17 for both). Bipolar and schizophrenia scores showed weaker associations in the same age band. The associations fell steadily as starting age rose, and were absent at 20–24 and 25+.

Read that against the 2016 finding. The strongest apparent effect of hormonal contraception on mood is in the youngest users — and the youngest users are, on average, genetically more predisposed to depression and ADHD before they take anything. The authors' conclusion is that genetic confounding could explain some of the association. That is not a debunking, but it means the adolescent number is measuring at least two things at once.

3. The reference group is self-selecting. Over a 13-year follow-up, women who never once used hormonal contraception are an unusual group, and women who tried it and stopped because it made them feel bad move out of the user group — which tends to make continuing users look better and the comparison less clean than the sample size suggests.

If this pattern feels familiar from the rest of this series, it should. It is the fourth time: benzodiazepines and dementia, melatonin and dementia, quetiapine and dementia, and now contraception and depression. In each case an observational signal partly reflects who receives the treatment rather than what the treatment does. Spotting that is the single most useful skill for reading health research.

What the randomised trial found — and it is not nothing

All of the above is observational. There is one well-conducted randomised controlled trial, and its result is the most useful single thing on this page.

Zethraeus and colleagues randomised 340 healthy women aged 18–35 to either a first-choice combined oral contraceptive (150 μg levonorgestrel + 30 μg ethinylestradiol) or placebo, double-blind, for three months, with 332 completing follow-up.5 What they found:

  • General well-being fell significantly on the contraceptive versus placebo — a difference of −4.12 (95% CI −7.18 to −1.06) on the Psychological General Well-Being Index.
  • Three sub-dimensions moved significantly: positive well-being −3.90 (−7.78 to −0.01), self-control −6.63 (−11.20 to −2.06), and vitality −6.84 (−10.80 to −2.88).
  • Depressive symptoms did not change significantly — neither the Beck Depression Inventory nor the PGWBI's own depressed-mood dimension reached significance.

So the causal evidence supports a specific, narrower claim than the headlines: a standard combined pill measurably reduced how well women felt — energy, sense of control, positive mood — without producing measurable depression over three months. The authors' own line is that a reduction in general well-being "should be of clinical importance."

That distinction is worth holding onto, because it validates something many women report and are routinely told is imaginary, while declining to overclaim. "This makes me feel flat and less myself" is consistent with the best trial we have. "This gave me clinical depression" is not something that trial demonstrated — and three months is short, 340 women is modest, and one trial of one formulation cannot speak for every progestin.

Progestin-only methods, and the postpartum picture

Progestin-only methods come out better than the 2016 registry numbers imply once you look at the dedicated reviews.

A systematic review of 26 studies on progestin-only contraception and depression — 5 randomised trials, 11 cohort studies, 10 cross-sectional — found minimal association, with no correlation in implant studies, no difference in injection trials, and no increase in depression scores in most pill studies, though the authors were candid that study quality was frequently low and risk of bias medium to high.6

Postpartum, the picture is more interesting still. A systematic review found no consistent association between postpartum hormonal contraceptive use and postpartum depression — and one included study found a 35–44% decreased risk of postpartum depression with progestin-only pills and levonorgestrel IUDs.7 One study of a particular injectable found a two- to three-fold increased risk at six weeks that was gone by three months. The evidence base is thin enough that the honest summary is "no clear signal either way," not "safe" and not "risky."

The part that matters most, and it is about us

If you take hormonal contraception, this is the most consequential thing in our entire blog library, so we are putting it as plainly as we can.

St John's Wort can stop your contraception working. It is a potent inducer of the CYP3A4 enzyme system, which clears the hormones in combined contraception. Induction ramps up over one to two weeks of regular use and takes a similar time to fade after stopping, so the risk window outlasts the last capsule. The consequence is not theoretical: reduced oral contraceptive efficacy with reported unplanned pregnancies is one of the documented outcomes, and we go through the full interaction list in our St John's Wort write-up.

St John's Wort is in our Sleep Support blend, at an amount that is not disclosed on the label and cannot be published. Our manufacturer confirmed in September 2026 that the per-ingredient amounts in that blend are not available to release, and there is no timeline on that. Not knowing the dose is a reason to be more cautious, not less. So: if you rely on hormonal contraception, do not take Sleep Support without clearing it with your doctor or pharmacist first, and mention St John's Wort by name. If you want a sleep product from us where every ingredient's dose is published and which contains no St John's Wort, that is Sleep Formula — here is how the two compare.

And here is the trap this page exists to head off. Someone reads that hormonal contraception may be flattening their mood. They don't want to stop it, and they don't want a prescription, so they look for something natural for low mood. The single most popular over-the-counter supplement for low mood is St John's Wort — the one ingredient that can disable the contraception they were trying not to stop. There is no symptom when it happens. That loop is the reason we treat this ingredient the way we do, and the reason a company that sells it inside a blend has an obligation to say so on the page where people will actually be looking.

On what supplements can legitimately do here: magnesium has the most studied case in cycle-related symptoms, and we went through it in PMS, PMDD and magnesium. The broader question of whether a supplement belongs in a low-mood plan at all is answered as straight as we could manage in can supplements help with anxiety and low mood — and the answer is mostly no.

The short version

  • Hormonal contraception suppresses your own cycle rather than regulating it. Because progesterone's metabolite acts on the GABAA system, that is a plausible route to mood effects.
  • Progestins are not interchangeable. Reacting badly to one says little about another.
  • The Danish cohort of 1,061,997 women found elevated antidepressant initiation across every method, strongest in 15–19 year olds (RR 1.8 combined, 2.2 progestin-only), peaking six months in.
  • The same group found RR 1.97 for suicide attempt and 3.08 for suicide — on 71 total suicides across 3.9 million person-years. Real, and very rare.
  • Those figures are confounded by healthy user bias and, per a 2025 polygenic study, by genetic liability: depression and ADHD polygenic scores predict starting contraception at 10–14 (HR 1.21 each), which is exactly where the strongest signal sits.
  • The one randomised trial found significantly reduced general well-being, vitality and self-control — and no significant effect on depressive symptoms. "Feeling flat" is supported. "Causes depression" is not demonstrated.
  • Progestin-only methods show minimal association across 26 studies, and postpartum the evidence shows no clear signal in either direction.
  • St John's Wort can cause contraceptive failure, including documented unplanned pregnancies. It is in Sleep Support at an undisclosed amount. If you rely on hormonal contraception, clear it with a prescriber first.

The rest of this series

These are our explainers on the medication classes that come up most often alongside what we sell. Each one is the mechanism, the best current evidence, and the places where that evidence is weaker or stranger than the standard account — including where it counts against us.

  • What SSRIs actually do — the serotonin transporter, why the "chemical imbalance" account is disputed in print, and why published withdrawal estimates range from about 15% to 55%.
  • What benzodiazepines actually do — GABAA amplification, why Z-drugs are not a separate category, and why stopping badly is the genuinely dangerous part.
  • What ADHD stimulants actually do — dopamine and noradrenaline transporters, where efficacy stops climbing with dose, and the placebo study that should unsettle every focus supplement on the market.
  • What antipsychotics actually do — four dopamine pathways and the side effects that follow, tardive dyskinesia rates, and the one prescribed off-label as a sleeping tablet.

This article is for informational purposes only and has not been evaluated by the FDA. It is not intended to diagnose, treat, cure, or prevent any disease. We are not doctors, pharmacists or prescribers. Nothing here is a reason to start or stop contraception — stopping carries its own consequences, including unintended pregnancy, and any change belongs with the clinician who prescribes it. If your mood has changed since starting a hormonal method, that is worth raising with them rather than acting on alone. If you take any prescription medication, including hormonal contraception, speak to your doctor or pharmacist before taking any supplement.

References

  1. Skovlund CW, Mørch LS, Kessing LV, Lidegaard Ø. "Association of Hormonal Contraception With Depression." JAMA Psychiatry, 2016, 73(11):1154–1162. doi:10.1001/jamapsychiatry.2016.2387
  2. Skovlund CW, Mørch LS, Kessing LV, Lange T, Lidegaard Ø. "Association of Hormonal Contraception With Suicide Attempts and Suicides." The American Journal of Psychiatry, 2018, 175(4):336–342. doi:10.1176/appi.ajp.2017.17060616
  3. Larsen SV, Frokjaer VG, Ozenne B. "Methodological obstacles in studies linking hormonal contraception and depression." The British Journal of Psychiatry, 2025, 226(6):334–336. doi:10.1192/bjp.2025.119
  4. Mundy J, Hall ASM, Agerbo E, Albiñana C, Steinbach J, Vilhjálmsson BJ, Østergaard SD, Musliner KL. "Genetic Confounding of the Association Between Age at First Hormonal Contraception and Depression." Acta Psychiatrica Scandinavica, 2025, 151(4):529–536. doi:10.1111/acps.13774
  5. Zethraeus N, Dreber A, Ranehill E, Blomberg L, Labrie F, von Schoultz B, Johannesson M, Hirschberg AL. "A first-choice combined oral contraceptive influences general well-being in healthy women: a double-blind, randomized, placebo-controlled trial." Fertility and Sterility, 2017. doi:10.1016/j.fertnstert.2017.02.120
  6. Worly BL, Gur TL, Schaffir J. "The relationship between progestin hormonal contraception and depression: a systematic review." Contraception, 2018. doi:10.1016/j.contraception.2018.01.010
  7. Ti A, Curtis KM. "Postpartum hormonal contraception use and incidence of postpartum depression: a systematic review." The European Journal of Contraception & Reproductive Health Care, 2019. doi:10.1080/13625187.2019.1569610