The impact of a vegan diet on pregnancy outcomes.

Published on May 1, 2021in Journal of Perinatology1.967
· DOI :10.1038/S41372-020-00804-X
Tomer Avnon4
Estimated H-index: 4
(TAU: Tel Aviv University),
Efrat Paz Dubinsky2
Estimated H-index: 2
(Tel Aviv Sourasky Medical Center)
+ 3 AuthorsYariv Yogev51
Estimated H-index: 51
(TAU: Tel Aviv University)
Sources
Abstract
To determine the effect of a maternal vegan diet on pregnancy outcome. This is a prospective observational study. Women with a singleton pregnancy who maintained the same diet prior to, and throughout current pregnancy were enrolled. Stratification was performed according to diet type: vegans, lacto–ovo–vegetarians, fish-eaters, and omnivores. Overall, 273 women were enrolled, of them, 112 omnivores, 37 fish-eaters, 64 lacto–ovo–vegetarians, and 60 vegans. The vegan diet was significantly associated with an increased risk of small-for-gestational-age newborns compared only to an omnivore diet (RR = 5.9, 95% CI, 1.2–21.8). The incidence of preterm birth was similar in all groups. Vegans had lower birthweight compared to lacto–ovo–vegetarians (3015 ± 420 g vs. 3285 ± 482 g, P = 0.004), and to omnivores (3328 ± 495 g, P < 0.001), but not to fish-eaters. Vegans also had a lower mean gestational weight gain compared only to omnivores (11.6 ± 4.2 kg vs. 14.3 ± 4.6 kg, P = 0.001). The vegan diet is associated with an increased risk for small-for-gestational-age newborns and lower birthweight.
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