Dear Dr. Åmark,

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Sikolia Wanyonyi

Academic Editor

PLOS ONE

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Additional Editor Comments:

The reviewers have recommended minor revisions. Please address them and resubmit the manuscript for consideration.

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Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. Is the manuscript technically sound, and do the data support the conclusions?

Reviewer #1: Yes

Reviewer #2: Yes

Reviewer #3: Yes

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2. Has the statistical analysis been performed appropriately and rigorously? -->?>

Reviewer #1: Yes

Reviewer #2: Yes

Reviewer #3: Yes

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3. Have the authors made all data underlying the findings in their manuscript fully available??>

The PLOS Data policy

Reviewer #1: Yes

Reviewer #2: No

Reviewer #3: No

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4. Is the manuscript presented in an intelligible fashion and written in standard English??>

Reviewer #1: Yes

Reviewer #2: Yes

Reviewer #3: Yes

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Reviewer #1: This is a retrospective descriptive study of still births in twin pregnancies between 2000 and 2021, using data from Stockholm stillbirth group 10 and Swedish Pregnancy Register. The authors’ aim was to examine pregnancy characteristics, and determine the incidence, risk factors and causes of still birth in twin pregnancies.

The abstract and introduction to the research topic were well written and relevant. The methodology was well described, and appropriate statistical analysis was made. Comparisons were made between the singleton and twins still births according to the chorionicity of the twins. The results were satisfactorily presented with figures and tables. The discussion and conclusions were relevant to the results provided. The strength and limitations to the study were provided.

This study further educates the readers on the influence of chorionicity of twin pregnancy on stillbirths and advances existing literature on the topic.

Reviewer #2: The manuscript is well written and documented, the undocumented aspect was clearly stated by the author, and it was due to incomplete data. I commend the work, it is an excellent contribution to knowledge and it will serve as a good reference for future research in this category.

Reviewer #3: This is an interesting paper highlighting stillbirth in the area. However authors should make their discussions more robust by comparing findings from their study with previous study. For example. the finding that placental insufficiency was strongly associated with stillbirths in singleton and dichorionic twins should be compared with other findings in the subregion and other climes.

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Reviewer #1: No

Reviewer #2: Yes:  Akinyosoye Ajiboye

Reviewer #3: Yes:  Dr. Emmanuel Ajuluchukwu Ugwa PhD FWACS FMCOG

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Stillbirth in twin pregnancies in Stockholm County 2000-2021 - a descriptive study

PONE-D-25-23412R1

Dear Dr. Åmark,

We’re pleased to inform you that your manuscript has been judged scientifically suitable for publication and will be formally accepted for publication once it meets all outstanding technical requirements.

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Kind regards,

Sikolia Wanyonyi

Academic Editor

PLOS ONE

Additional Editor Comments (optional):

Thank you for addressing the comments raised by the reviewers.

Reviewers' comments: