highly significantP = 9.43 × 10 −5
We used a fixed-effects model to validate this observation (“Methods”) and detected a highly significant difference ( P = 9.43 × 10 −5 ) in mean effect between pre-natal ( \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{d