postpartum depression

you are supposed to be flooded with love and instead you are flooded with dread, or with nothing at all. everyone is asking how the baby is sleeping. nobody is asking how you are, and you have started building the sentence in your head and abandoning it, because saying it out loud sounds like an admission that you should not have done this.

it is not an admission. it is common enough that it has been measured in more than a million women across 80 countries. here is what that measurement says.

roughly one in six — and it does not stop at six weeks

pooling 565 studies of 1,236,365 women across 80 countries, postpartum depression affected 17.22% (95% CI 16.00–18.51)^[1]. rates varied enormously by place, reaching 39.96% in Southern Africa.

the detail that matters more than the headline: prevalence stayed broadly flat across the whole first year — 17.70% at 1–3 months, 15.31% at 3–6 months, 18.19% at 6–12 months^[1]. this is not a condition that reliably declares itself in the early weeks and then fades. screening concentrated at the six-week check is looking in one place for something spread across twelve months.

the caveat, stated plainly: most of those studies used self-report screening scales rather than diagnostic interviews, so this is a symptom-threshold prevalence and will run higher than the rate of diagnosed major depression.

“I have never been depressed before” is weaker protection than you think

one analysis restricted itself to 58 studies of 37,294 mothers with no prior history of depression who delivered healthy full-term infants. prevalence was 17% (95% CI 15–20%) and the incidence of new cases 12% (95% CI 4–20%)^[2] — essentially the same as the all-comers global figure.

that incidence interval is very wide, and prevalence differed sharply by region (26% in the Middle East versus 8% in Europe), so the single number hides real variation. but the direction is not ambiguous: a clean psychiatric history is not the shield people treat it as, and it should not be the reason nobody watches you closely.

what has evidence behind it

therapy, and started after the birth. across 40 randomised and quasi-randomised trials of CBT during pregnancy and the first postpartum year, CBT significantly reduced depressive symptoms compared with control conditions, in both treatment and prevention trials, and women who received preventive CBT had significantly lower rates of postpartum depressive episodes. interventions started after the birth outperformed those started during pregnancy, and in prevention trials one-to-one delivery beat group formats^[3]. the trials varied widely in quality, which the author says outright.

a trained peer on the phone. 701 Ontario mothers screened as high-risk for postnatal depression were randomised to proactive telephone support from a trained volunteer who had herself recovered from postnatal depression, or to usual care. at 12 weeks, 14% of the peer-support group scored above the depression threshold versus 25% of controls — a number needed to treat of 8.8 (95% CI 5.9 to 19.6). over 80% of the women who received it were satisfied and would recommend it^[4].

prevention, formally recommended. the US Preventive Services Task Force issued a B recommendation that clinicians provide or refer pregnant and postpartum people at increased risk of perinatal depression to counselling interventions, finding convincing evidence that CBT and interpersonal therapy prevent it and no more than small potential harms^[5]. increased risk includes a history of depression, current depressive symptoms, or socioeconomic factors such as low income or young or single parenthood.

the same statement judged the evidence inadequate for non-counselling prevention approaches — physical activity, education, infant sleep training, nortriptyline, sertraline and omega-3s^[5]. inadequate means not enough good trials existed in 2019 to say either way. it does not mean those things were shown to fail. the recommendation is US-specific and now several years old.

medication, breastfeeding, and what this page will not do

the most searched question in this whole subject is whether you can be treated while breastfeeding. we are not going to answer it here, and the reason is that the evidence set behind this page is deliberately non-drug — it contains no medication trials, no lactation pharmacology, and nothing about drug transfer into milk. answering anyway would be exactly the kind of confident, unsourced sentence this site exists to avoid.

two things we will say. first: this is a prescriber conversation, and it is a real one — people have it every day and it has actual answers, specific to the drug, the dose, the age of your baby and your history. second: uncertainty about medication is not the same as a reason to go without help. counselling is the option with evidence on this page^[3],[5], and it does not involve this trade-off at all. if you are already taking something, do not change it on the strength of a web page — that decision belongs with the person who prescribed it.

what to ask for

• will anyone screen me at my later appointments, or only at the six-week check? the risk runs across the whole first year.
• i have never had depression before — does that actually change how closely you will watch me?
• do i meet the USPSTF increased-risk criteria, and can you make the counselling referral now rather than waiting to see how i do?
• if i would rather try therapy than medication, can i be seen individually rather than in a group?
• if medication is on the table and i am breastfeeding, what are the specific trade-offs for this drug, at this dose, with a baby this age?

if you are still pregnant, the pregnancy page covers antenatal depression and anxiety, what the pooled evidence really says about birth outcomes, and the 10.4% of fathers who get depressed in the same window.