Hormonal birth control is associated with a small but real increase in the risk of suicidal thoughts and suicide attempts at a population level, though most users will never experience these effects. The largest study on the topic, a Danish nationwide cohort tracking nearly half a million women, found that current and recent users of hormonal contraceptives had roughly double the risk of a first suicide attempt compared with women who had never used them. That statistic sounds alarming, and it deserves a careful look, because the absolute risk remains low, the relationship between hormones and mood is far from straightforward, and for some women, hormonal contraception actually improves mental health.
What the Largest Studies Actually Found
The strongest evidence comes from Scandinavian national health registries, which track millions of people over years and link prescription records to hospital visits and causes of death. A 2017 study in the American Journal of Psychiatry followed roughly 475,000 Danish women with no prior psychiatric diagnoses for an average of about eight years. Among current and recent users of hormonal contraceptives, the relative risk of a first suicide attempt was about twice that of women who had never used them, and the relative risk of dying by suicide was roughly three times higher. The association peaked about two months after starting a hormonal method.1PubMed. Association of Hormonal Contraception With Suicide Attempts and Suicides
A separate meta-analysis of three large British and North American cohorts, covering more than 184,000 women, found a more modest but still elevated risk of suicide death among oral contraceptive users, with an overall risk ratio of about 1.36 compared with non-users. Swedish registry data told a similar story: the risk of suicidal behavior was elevated in the first month of use, particularly for progestin-only pill users, who showed roughly a threefold increase in that early window. For combined pill users, the elevated risk faded after the first year, but progestin-only pill users remained at higher risk even beyond twelve months.2PubMed Central. Oral Contraceptives and the Risk of Psychiatric Side Effects: A Review – Section: Suicidal Behaviors in OC Users
These numbers describe relative risk, not absolute risk. If the baseline rate of a first suicide attempt among young women is low to begin with, doubling a small number still produces a small number. That is not a reason to dismiss the finding, but it does mean that the vast majority of women using hormonal birth control will not attempt suicide because of it. The clinical question is really about who is most vulnerable.
Why Teenagers Face the Highest Risk
Across nearly every large study, one pattern holds: adolescents show the strongest association between hormonal contraceptives and mood problems. In the Danish suicide study, women in the youngest age groups had the highest relative risk for suicide attempts.1PubMed. Association of Hormonal Contraception With Suicide Attempts and Suicides A companion study from the same research group, which tracked over one million women for depression, found that adolescents aged fifteen to nineteen using combined oral contraceptives had a relative risk for first antidepressant use of about 1.8, compared with 1.23 for users of all ages.3PubMed. Association of Hormonal Contraception With Depression A Swedish register study found that the levonorgestrel IUD was associated with more than double the risk of depression in adolescent women compared with adult users.4PubMed. Levonorgestrel intrauterine device and depression: A Swedish register-based cohort study
A prospective cohort study following adolescents into early adulthood found that those who used oral contraceptives during their teen years had higher odds of a major depressive episode later, and the effect was strongest in young women with no prior history of depression.5PubMed Central. Association between adolescent oral contraceptive use and future major depressive disorder: a prospective cohort study The adolescent brain is still developing, and the hormonal systems that regulate mood and stress responses are not fully mature. This may make younger users more sensitive to exogenous hormones, though no one has pinned down the exact mechanism responsible for the age difference.
The Problem with Confounders
All of the large studies showing an association are observational. Nobody randomized hundreds of thousands of women to hormonal contraception versus nothing, and nobody ethically could for a study focused on suicide risk. That means unmeasured confounders could be inflating the numbers. Women who start hormonal contraception are, by definition, sexually active, typically in a relationship, and navigating a life stage (late adolescence and young adulthood) that already carries elevated depression and suicide risk for reasons that have nothing to do with a pill.
A U.S. study of adolescent girls illustrates the problem. Before adjusting for confounders, oral contraceptive users appeared nearly twice as likely as non-users to have a lifetime depressive disorder. But once researchers accounted for factors like age at first sexual activity, the association disappeared entirely. In the fully adjusted models, oral contraceptive use showed no meaningful link to depression.6PubMed Central. Oral Contraceptive Use and Depression Among Adolescents That doesn’t prove the Danish findings are wrong. It means the question is harder to settle than registry data alone can manage, and the truth likely lives somewhere between “no effect at all” and “doubles your risk.”
How Hormonal Contraceptives Might Affect the Brain
Several plausible biological pathways connect synthetic hormones to mood changes. None has been proven to be the primary culprit, but together they paint a picture of real neurochemical disruption in at least some users.
One line of research focuses on the stress system. A study of 233 premenopausal women found that oral contraceptive users had elevated cortisol levels and changes in gene expression that resembled what you would see in someone under chronic psychological stress. Users also had smaller hippocampal volumes, a brain region important for mood regulation and memory.7PubMed Central. Evidence for Stress-like Alterations in the HPA-Axis in Women Taking Oral Contraceptives The type of progestin matters for this stress response, with older, second-generation progestins showing the strongest effects on cortisol and progesterone release during a stress test.8Neurobiology of Stress. Effects of hormonal contraceptive phase and progestin generation on stress-induced cortisol and progesterone release
Serotonin, the neurotransmitter most associated with depression in the public mind, also appears affected. A brain imaging study showed that oral contraceptive users had roughly nine to twelve percent lower binding of serotonin 4 receptors across the brain, with the largest reduction in the hippocampus.9PubMed Central. Oral contraceptives and the serotonin 4 receptor: a molecular brain imaging study in healthy women Older research established that oral contraceptives reduce the availability of serotonin and norepinephrine at receptor sites and can alter folate and vitamin B12 levels, both of which are involved in neurotransmitter production.10PubMed. Oral contraceptives and depressive symptomatology: biologic mechanisms
A third mechanism involves a neurosteroid called allopregnanolone, which acts on the brain’s main calming system (the GABA receptors that are also targeted by drugs like benzodiazepines). Natural progesterone gets converted into allopregnanolone, producing anti-anxiety and sedative effects. Some synthetic progestins in birth control are converted into this calming neurosteroid, but others are not. Whether your pill protects against anxiety or chips away at your calm may depend, in part, on the chemical structure of the progestin it contains.11PubMed. Progesterone and progestins: effects on brain, allopregnanolone and beta-endorphin
Not All Methods Carry the Same Signal
The Danish suicide study broke down risk by contraceptive type, and the differences were striking. Compared with never-users, the relative risk of a first suicide attempt was about 1.9 for combined oral contraceptives, about 2.3 for progestin-only pills, roughly 2.6 for the vaginal ring, and about 3.3 for the patch.1PubMed. Association of Hormonal Contraception With Suicide Attempts and Suicides That gradient could reflect differences in hormone dose, progestin type, or delivery route. The patch and ring deliver hormones more steadily but can result in higher systemic levels than a daily pill, which may matter.
The hormonal IUD adds a wrinkle. It is often presented as “mostly local” because it releases progestin directly into the uterus rather than circulating it through the bloodstream. But a Swedish registry study linked the levonorgestrel IUD to a fifty-seven percent increased risk of depression, with the strongest effect in adolescents and first-time hormonal contraceptive users.4PubMed. Levonorgestrel intrauterine device and depression: A Swedish register-based cohort study Dose appears to matter here too. A Danish study comparing high-dose and low-dose levonorgestrel IUDs found that women using the lower-dose versions had roughly fifteen to twenty-three percent lower rates of depression compared with the standard high-dose device.12The Lancet Regional Health – Europe. Depression risk in users of different doses of levonorgestrel intrauterine systems
Yet a network meta-analysis of randomized trials found something surprising: no specific hormonal contraceptive formulation caused significantly more depressive symptoms than any other. Neither the type of progestin (androgenic versus anti-androgenic) nor the estrogen dose meaningfully predicted who would get more depressed.13BJPsych Open. Hormonal contraceptive use and depressive symptoms: systematic review and network meta-analysis of randomised trials This mismatch between registry data and trial data is one of the most frustrating aspects of the research. The registries see large associations; the controlled trials mostly do not. Part of the explanation may be that clinical trials tend to exclude women with pre-existing mental health conditions and lose participants who develop side effects early, both of which would dampen the signal.
Most Users Report No Mood Problems, and Some Feel Better
A critical review of combined hormonal contraception and mood found that most women demonstrate either no effect or a beneficial effect on mood, with adverse mood effects occurring at a low incidence.14PubMed. Combined hormonal contraception and its effects on mood: a critical review For women who already have depression or bipolar disorder, the picture is also more reassuring than you might expect. A systematic review found that among women with clinically diagnosed mood disorders, hormonal contraceptives generally did not worsen symptoms. In one trial, adolescent girls with depression who used combined oral contraceptives actually showed improved depression scores after three months compared with a placebo group.15PubMed Central. Safety of hormonal contraception and intrauterine devices among women with depressive and bipolar disorders: a systematic review
A clinical review in the American Journal of Psychiatry concluded that all contraceptive methods are acceptable for women with depression and that clinical studies and randomized trials of women with psychiatric disorders have generally reported similar or lower rates of mood symptoms in users compared with non-users.16PubMed. Contraception for Women With Psychiatric Disorders This seems contradictory, but it makes more sense when you consider that hormonal contraceptives stabilize the hormone fluctuations that can trigger mood episodes in people with conditions like premenstrual dysphoric disorder.
When Birth Control Treats Depression Rather Than Causing It
Premenstrual dysphoric disorder, or PMDD, is a condition in which the natural rise and fall of hormones across the menstrual cycle triggers severe depression, irritability, and anxiety in the days before a period. For these women, the same hormonal flattening that may cause mood problems in others is therapeutic. A randomized trial of a pill containing drospirenone and ethinyl estradiol found that about sixty-two percent of women with PMDD reported meaningful improvement, compared with roughly thirty-two percent on placebo.17PubMed. Treatment of premenstrual dysphoric disorder with a new drospirenone-containing oral contraceptive formulation A Cochrane review confirmed a moderate benefit of drospirenone-containing pills for overall premenstrual symptoms, though the evidence quality was rated low.18Cochrane Database of Systematic Reviews. Birth control pills with drospirenone for treating premenstrual syndrome
The broader point is that hormonal contraception’s mood effects are not uniformly negative. They exist on a spectrum. Some women feel worse, some feel no different, and some feel genuinely better. One review framed it this way: hormonal contraceptives may promote improved mental health in certain subsets of women, particularly those with cycle-linked psychiatric disorders.19PubMed. Hormonal Contraceptives and Mood: Review of the Literature and Implications for Future Research That is not a dodge. It reflects a genuine biological divergence in how different brains respond to the same hormonal manipulation.
The Role of Expectations and the Nocebo Effect
One complicating factor that researchers rarely discuss with patients is the nocebo effect. If you expect a drug to make you feel bad, that expectation alone can produce symptoms. A study in the journal Contraception argued that some of the nonspecific side effects attributed to oral contraceptives, including mood changes, may partly reflect this phenomenon. Women who are warned to expect mood problems may be more likely to notice and report them.20PubMed. Nonspecific side effects of oral contraceptives: nocebo or noise? This does not mean mood side effects are imaginary. It means teasing apart the biological signal from the psychological noise is harder than it looks, and it is one more reason why randomized, placebo-controlled trials sometimes fail to replicate what registry studies detect.
A related issue: women who are already experiencing depressed mood or stress are more likely to discontinue oral contraceptives and to attribute side effects to the pill.21PubMed Central. Influence of depressed mood and psychological stress symptoms on perceived oral contraceptive side effects and discontinuation in young minority women In surveys, side effects are the most common reason women cite for switching or stopping contraception, mentioned by nearly half of those who do so.22PubMed Central. Psychological side effects of hormonal contraception: a disconnect between patients and providers Some of those women are experiencing a genuine pharmacological effect. Others may be going through a difficult period for unrelated reasons and attributing their distress to the most recent change in their life, which happened to be starting a new contraceptive. Clinicians face the challenge of taking mood complaints seriously without assuming every case is drug-induced.
Practical Steps If You’re Concerned
If you are starting hormonal contraception or considering a switch, a few things are worth knowing. The first two months appear to be the highest-risk window for suicidal behavior based on the Danish data.1PubMed. Association of Hormonal Contraception With Suicide Attempts and Suicides The risk for antidepressant use peaked at about six months.3PubMed. Association of Hormonal Contraception With Depression Paying attention to your mood during these early months is reasonable, and so is telling someone you trust to watch for changes you might not recognize yourself.
Some clinicians have proposed pre-prescription screening questions about mental health history, past reactions to hormonal methods, and any history of self-harm. Validated tools for depression and suicide risk exist and can help establish a baseline before starting contraception, making it easier to detect changes later.23Frontiers in Psychiatry. Hormonal contraception and mental health: a narrative review of screening, monitoring, and patient-centered care for family physicians If your clinician does not ask about mood history before writing a prescription, bring it up yourself. This is especially important for teenagers and for anyone who has experienced depression before.
If you notice worsening depression, new anxiety, or suicidal thoughts after starting a hormonal method, the standard advice from clinical reviews is straightforward: take the temporal relationship seriously.24PubMed Central. Hormonal contraception and mood disorders That might mean switching to a different formulation, trying a lower hormone dose, or moving to a non-hormonal method like the copper IUD. It does not mean you have to stop contraception altogether, and it does not mean every bad day is the pill’s fault. But hormonal contraception should never require you to white-knuckle through worsening mental health on the assumption that it will pass.
Genetics and Individual Vulnerability
One of the most promising but still early areas of research involves pharmacogenetics. A study of oral contraceptive users found that a specific genetic variant, rs1360780 in the FKBP5 gene, modified how the pill affected cortisol signaling, stress-gene expression, and even brain structure. Women carrying that variant who used oral contraceptives showed different methylation patterns in a gene linked to psychiatric disease, and the pill also changed the relationship between cortisol and depressive symptoms depending on genotype.7PubMed Central. Evidence for Stress-like Alterations in the HPA-Axis in Women Taking Oral Contraceptives In plain terms, your DNA may partly determine whether hormonal contraception tips your stress system in a harmful direction or leaves it untouched.
Researchers have begun cataloguing other gene variants suspected to play a role, though the field is young and no genetic test is currently available to predict who will react poorly.25PubMed Central. Genetic variation associated with side effects of hormonal contraception exposure: a narrative review For now, the practical takeaway is humbling: two women can take the same pill at the same dose and have completely different experiences, and that divergence is at least partly written in their genes. Until pharmacogenomic screening becomes validated and routine, the best tool for identifying vulnerability is still careful attention to mood after starting or changing a method.