<p>The study was interesting but had some technical challenges in the presentation making it difficult to ascertain what really happened. The objective of the study was not stated. &nbsp;It is not clear from the method section which analysis was performed. &nbsp;There was no analytical comparison of the results between the cases and control. It was not clear how the pregnant women who were taking and not taking supplements were recruited and if the study was well-powered to make the comparison.&nbsp;</p>