The effects of exercise during pregnancy on placental composition : A systematic review and meta-analysis

Journal article

Kubler, Jade M., Clifton, Vicki L., Moholdt, Trine and Beetham, Kassia S.. (2022). The effects of exercise during pregnancy on placental composition : A systematic review and meta-analysis. Placenta. 117, pp. 39-46. https://doi.org/10.1016/j.placenta.2021.10.008
AuthorsKubler, Jade M., Clifton, Vicki L., Moholdt, Trine and Beetham, Kassia S.
Abstract

Introduction
Morphological changes to the placenta occur as the demands of the foetus increase throughout gestation. Physical activity during pregnancy is known to benefit both the mother and infant, however the impact of antenatal exercise training on placental development is less known. The aim of this systematic review and meta-analysis was to investigate the effects of exercise training during pregnancy on measures of placental composition.

Methods
Six electronic databases were searched from inception to June 2021 for studies comparing regular antenatal exercise with either usual maternal care or no exercise for its effect on measures of placental morphological composition. Meta-analyses were performed for placental weight and the placental weight to birthweight (PWBW) ratio.

Results
Seven randomised controlled trials and two cohort studies were included in the systematic review and meta-analysis (n = 9). There was no significant difference in placental weight (mean difference (MD) = -9.07g, p = 0.42) or the PWBW ratio (MD = 0.00, p = 0.32) between exercise and control groups. Parenchymal tissue volume was higher, represented by an increase in villous tissue, and non-parenchymal volume was lower in women who exercised regularly compared to those that were not exercising during pregnancy.

Discussion
Exercise training during pregnancy may not alter placental weight or the PWBW ratio. However, findings from this review indicate that antenatal exercise training can promote advantageous morphological changes to placental tissues.

Keywordsplacenta; pregnancy; antenatal exercise; physical activity
Year2022
JournalPlacenta
Journal citation117, pp. 39-46
PublisherElsevier Ltd
ISSN0143-4004
Digital Object Identifier (DOI)https://doi.org/10.1016/j.placenta.2021.10.008
PubMed ID34768167
Scopus EID2-s2.0-85118850425
Page range39-46
Publisher's version
License
All rights reserved
File Access Level
Open
Output statusPublished
Publication dates
Online21 Oct 2021
Publication process dates
Accepted13 Oct 2021
Deposited18 Oct 2023
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