Mental disorder transmission is known to be intergenerational but it remains unclear if the associations might be attributable to unmeasured shared familial factors (e.g., genetics, shared environments). In this issue, Mengping Zhou and colleagues investigate the associations between parental psychiatric conditions and offspring psychiatric, behavioral, and psychosocial outcomes, in 15,603 Swedish individuals (born to 7,742 monozigotic-twin parents), using a children-of-monozygotic-twins study design. They report that familial factors likely contribute substantially to the intergenerational transmission of parental psychiatric conditions to offspring psychiatric, behavioral, and psychosocial outcomes, but that nonshared factors or direct causal effects may also play a role. Zhou et al. 2025
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Editorial
Raising the bar for causal inference: PLOS Medicine adopts the TARGET guidelines for target trial emulation studies
PLOS Medicine: published October 31, 2025 | https://doi.org/10.1371/journal.pmed.1004796
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Association between parental psychiatric conditions and offspring psychiatric, behavioral, and psychosocial outcomes: A Swedish population-based children-of-monozygotic twins study
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Correction
Correction: Vaccination strategies, public health impact and cost-effectiveness of dengue vaccine TAK-003: A modeling case study in Thailand
PLOS Medicine: published October 24, 2025 | https://doi.org/10.1371/journal.pmed.1004789