For the partner: your own mental health
Roughly one in ten partners becomes depressed. Almost nobody screens for it.
Pooled across 74 studies and 41,480 fathers, the prevalence of paternal depression during pregnancy or the first postpartum year is 8.4% (95% CI 7.2 to 9.6). An earlier meta-analysis of 43 studies put it at 10.4%. Roughly one in ten, either way.
Anxiety runs at a similar level: 10.7% pooled across 23 studies, though the variation between studies is so extreme that this should be read as "around one in ten" rather than as a precise figure.
Both parents at once, across 29,286 couples:
| Period | Both parents depressed at the same time |
|---|---|
| During pregnancy | 1.72% (95% CI 0.96 to 2.48) |
| 0 to 12 weeks after birth | 2.37% (95% CI 1.66 to 3.08) |
| 3 to 12 months after birth | 3.18% (95% CI 2.30 to 4.05) |
It reaches the child, and the route matters. In a population cohort of more than 10,000 children, paternal depression at eight weeks was associated with emotional and behavioural problems at three and a half years (adjusted odds ratio 2.09, 95% CI 1.42 to 3.08), and with conduct problems in boys (2.66). That association held after accounting for the mother's depression.
The follow-up study traced how. Family factors, meaning the mother's depression and conflict in the couple, mediated about two-thirds of the effect. For maternal depression the equivalent figure was under a quarter.
It is not a reason to be told you are harming your baby. Those two readings lead to very different places, and only the first one is supported.
Nobody is going to catch this for you. ACOG's postpartum care document uses the word "partner" exactly once, in the phrase "intimate partner violence". Its consent guidance does not use it at all. In a survey of 100 pediatric clinicians, of 23 recommended practices for engaging fathers, 18 were routinely done by fewer than half of them, and the two least implemented of all were parenting support at 4% and screening fathers for perinatal depression at 5%.
It is not a competing claim on the family's attention. Where both parents are affected at once, roughly 2% to 3% of couples, rising to about 1 in 31 between three and twelve months after the birth, each of you needs treating in your own right. The association between your depression and hers is real but moderate, and this guide could not verify any study showing that treating one of you treats the other.