Fig 1

![Fig 1: CONSORT flow diagram for the NiPPeR randomized controlled trial examining maternal B-vitamin and vitamin D supplementation from preconception through pregnancy. Participant enrollment, randomization, and retention across study visits are documented.](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10697591/bin/pmed.1004260.g001.jpg)

> Source: Keith M Godfrey et al. "Maternal B-vitamin and vitamin D status before, during, and after pregnancy and ." *PLoS medicine*, 2023. PMID: [38051700](https://pubmed.ncbi.nlm.nih.gov/38051700/)

<figure>
  <img src="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10697591/bin/pmed.1004260.g001.jpg" alt="CONSORT flow diagram for the NiPPeR randomized controlled trial examining maternal B-vitamin and vitamin D supplementation from preconception through pregnancy. Participant enrollment, randomization, and retention across study visits are documented." />
  <figcaption>Fig 1. CONSORT flow diagram for the NiPPeR randomized controlled trial examining maternal B-vitamin and vitamin D supplementation from preconception through pregnancy. Participant enrollment, randomization, and retention across study visits are documented.<br>  Source: Keith M Godfrey et al. "Maternal B-vitamin and vitamin D status before, during, and after pregnancy and ." <em>PLoS medicine</em>, 2023. PMID: <a href="https://pubmed.ncbi.nlm.nih.gov/38051700/">38051700</a></figcaption>
</figure>