Does maternal vitamin D status influence placental weight or vascular and inflammatory pathology? Secondary analysis from the Kellogg Pregnancy Study.

What Was Tested

The paper reports a study of Vitamin D, K2, Magnesium and Zinc, published as a randomized controlled trial.

Chi-square analysis was used to determine differences between the percent pathology findings by treatment group.

Students t-test was used to determine the differences in vitD status and the frequency of placental lesions.

Why It Was Studied

Positive effects of vitamin D (vitD) supplementation on comorbidities of pregnancy (COP) have been explored; however, few studies have elucidated the pathophysiology behind the development of these COP and the potential relationship with derangements in placental development and morphology.

Who Took Part

PubMed tags the participants as women only.

Chi-square and Student's t-test were used to show the difference in maternal characteristics by treatment group and by placental weight.

Association between [25(OH)D] area under the curve (AUC) and placental morphology were determined in a regression model that included maternal BMI ≥ 30 kg/m2, race/ethnicity, and vitD treatment group allocation.

How the Study Was Run

The researchers set it up as a randomized, double-blind and placebo-controlled study.

The participants were allocated by chance, so the Vitamin D, K2, Magnesium and Zinc group and the comparison group should start out alike.

Neither the participants nor the staff measuring them knew who was on Vitamin D, K2, Magnesium and Zinc, so expectations could not easily colour the readings.

The comparison arm used a placebo, so changes seen with Vitamin D, K2, Magnesium and Zinc could be set against what happens without it.

The findings of the present study are a secondary analysis of data generated from a previously reported randomized controlled trial (RCT), the Kellogg Vitamin D Pregnancy Study.

Total [25(OH)D] was measured using radioimmunoassay (ng/mL).

What Was Measured

Topics PubMed links to this paper include Vitamin D, Vitamin D Deficiency, Vitamins, Placenta, Mothers and Dietary Supplements.

The authors tagged it with the keywords 25-hydroxyvitamin D, Inflammation, Placental weight and Pregnancy.

What This Means in Plain Language

The paper is a randomized, double-blind and placebo-controlled study of Vitamin D, K2, Magnesium and Zinc.

Results are reported in around 7 sentences of the abstract; we leave them to the paper itself rather than summarise them.

The publication is from 2023 (The Journal of steroid biochemistry and molecular biology), a journal based in England.

More context: the Vitamin D, K2, Magnesium and Zinc compound page, all human trials.