According to a study on ‘The length of uncomplicated human gestation’ by the Department of Epidemiology, Harvard School of Public Health in Boston, Massachusetts, they found:
â€For primiparas (first child), the median duration of gestation from assumed ovulation to delivery was 274 days, significantly longer than the predicted 266 days. For multiparas (more than one child), the median duration of pregnancy was 269 days, also significantly longer than the prediction. Moreover, the median length of pregnancy in primiparas proved to be significantly longer than that for multiparasâ€
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