Reviewer ’s report  
 
Title: Impact of preconceptional micronutrient supplementation on maternal mental health 
during pregnancy and postp artum: Results from a randomized controlled trial in Vietnam  
 
Version: 0 Date: 08 Jan 2017  
 
Reviewer: Vidya Seshan  
 
Reviewer's report:  
 
The manuscript is well written.  
However, the Method section needs more information regarding the sample, sample calculation, 
sampling technique, randomisation and data collection.  
How the resear cher monitored the compliance is also not clear. If you can elaborate the 
methodology section this doubts can be avoided.  
There is a sentence in the method section that the sample have been described in detail 
elsewhere. But I feel it is better to describ e the methodology in this manuscript.  
Are the methods appropriate and well described?  
If not, please specify what is required in your comments to the authors.  
 
No 
 
Does  the work include the necessary controls?  
If not, please specify which controls are required in your comments to the authors.  
 
Yes 
 
Are the conclusions drawn adequately supported by the data shown?  
If not, please explain in your comments to the authors.  
 
Yes 
 
Are you able to assess any statistics in the manuscript or would you recommend an  
additional statistical review?  
If an additional statistical review is recommended, please specify what aspects require further  
assessment in your comments to the editors.  
 
I recommend additional statistical review  
 
Quality of written English  
Please indicate the quality of language in the manuscript:  
 
Acceptable  
 
Declaration of competing interests  
Please complete a declaration of competing interests, considering the following quest ions:  
 
1. Have you in the past five years received reimbursements, fees, funding, or salary from an  
organisation that may in any way gain or lose financially from the publication of this  
manuscript, either now or in the future?  
 
2. Do you hold any stocks or shares in an organisation that may in any way gain or lose  
financially from the publication of this manuscript, either now or in the future?  
 
3. Do you hold or are you currently applying for any patents relating to the content of the  
manuscript?  
 
4. Have you  received reimbursements, fees, funding, or salary from an organization that 
holds  or has applied for patents relating to the content of the manuscript?  
 
5. Do you have any other financial competing interests?  
 
6. Do you have any non -financial competing inte rests in relation to this paper?  
 
If you can answer no to all of the above, write 'I declare that I have no competing interests' 
below.  If your reply is yes to any, please give details below.  
 
I declare that I have no competing interests  
 
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