Late-pregnancy inflammation wasn't linked to anxiety after birth. Past history was.

Cohort study. 237 people. one third-trimester blood sample (>=28 weeks' gestation, >7 days before delivery; median 35 weeks); self-reported GAD-7 within 24 weeks after birth (median 8.1 weeks).

People were watched for years. Nobody was told what to do. A clue, not proof.

Who: Pregnant adults (18+) receiving obstetric care at Mount Sinai, New York City, enrolled April 2020 - February 2022 (during COVID-19); 237 of 3,157 enrolled had a postpartum GAD-7 and an eligible third-trimester sample. Median age 33; 43.5% White, 30.8% Hispanic, 12.7% Black, 7.6% Asian; 70% had a bachelor's degree or more; 27% had a history of anxiety and/or depression

• 4 inflammation markersnoneno clear link
• Had anxiety/depression+3.6–4.9pts, 0–21 scale

More to know, from our read of the paper:

• Observational cohort: the history-of-anxiety link is an association, not proof of cause
• Null result for inflammation = no clear link found in 237 people, not proof of no link; only 16 people (6.8%) had moderate-to-severe anxiety (GAD-7 >= 10), so power was limited, especially at the upper end. Authors: any true association is 'likely to be modest'
• Only ONE blood sample per person, late in pregnancy, taken at routine visits (not standardised timing); changes across pregnancy or after birth were not measured
• Anxiety was self-reported once (GAD-7) within 24 weeks after birth; may underestimate anxiety over the whole postpartum period
• Selection: only 237 of 3,157 enrolled had both a postpartum survey and an eligible third-trimester sample; possible selection bias (authors say so). Sleep and social support were not measured

Researchers in New York City followed 237 pregnant people and tested routine blood samples from late pregnancy (around 35 weeks) for four inflammation markers. About eight weeks after birth, participants rated their own anxiety on a questionnaire. None of the markers was clearly linked to anxiety scores, while a history of anxiety or depression went with scores 3.6 to 4.9 points higher on a 0–21 scale. Only 6.8% had moderate or severe anxiety, so small links could have been missed. Linked, not proven.

We read the abstract and the full text of this paper and checked every number on this page against it (17 facts, checked on 2026-10-29). The study design is named above. Cohort and other observational studies are described as linked, not proven. Found an error? Email theis@onestudyaday.com.