Comparative immunogenicity of COVID-19 vaccination in pregnant and non-pregnant women: a real-world cohort study.

The ordinal distribution of vaccine doses showed a significant trend toward fewer doses in the pregnant cohort (linear-by-linear association, p = 0.004), with pregnant women underrepresented in the ≥4-dose category (3.2% vs. 11.8%) ( Table 2 ).

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Among participants with two doses ( n = 101), antibody levels were numerically lower in pregnant women, although the difference did not reach statistical significance (median 5.22 vs. 13.30 AU/mL; p = 0.070).

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