Reviewer’s report
Title: 
Quantitative ultrasound assessment of the effect of parity on bone mineral
density in females
Version: 
3 
Date: 
14 Jul 2021
Reviewer's report:
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Authors have answered all queries adequately. I suggest that the should modify
sentence on line 181 as follows: Line no. 181: 
Re write as: Some of the earlier did not observe effect of parity on BMD as these
studies included relatively older females with higher parity as compared to the
current study. This study investigated the long term effect of parity on BMD
whereas previous studies that reported a positive or unchanged effect of parity
on BMD were based on short-term effect on BMD [1, 11, 13, 20-22]. 
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Is the study design appropriate to answer the research question (including the use
of appropriate controls), and are the conclusions supported by the evidence
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