Cargando…

Pregnancy bias toward boys or girls: The Japan Environment and Children’s Study

The sex of the conceived child is a significant concern for parents. To verify whether there women have pregnancy bias toward boys or girls, we investigated whether the history of continuous same-sex pregnancy was associated with the subsequent child’s sex. We prospectively analyzed data from the Ja...

Descripción completa

Detalles Bibliográficos
Autores principales: So, Shuhei, Tawara, Fumiko, Taniguchi, Yu, Kanayama, Naohiro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10289377/
https://www.ncbi.nlm.nih.gov/pubmed/37352332
http://dx.doi.org/10.1371/journal.pone.0287752
_version_ 1785062263977148416
author So, Shuhei
Tawara, Fumiko
Taniguchi, Yu
Kanayama, Naohiro
author_facet So, Shuhei
Tawara, Fumiko
Taniguchi, Yu
Kanayama, Naohiro
author_sort So, Shuhei
collection PubMed
description The sex of the conceived child is a significant concern for parents. To verify whether there women have pregnancy bias toward boys or girls, we investigated whether the history of continuous same-sex pregnancy was associated with the subsequent child’s sex. We prospectively analyzed data from the Japan Environment and Children’s Study, a birth cohort study. We included all cases of singleton live births (n = 98 412). Women with pregnancy due to infertility treatment were excluded (n = 6255); Similarly, women with a history of miscarriage, artificial abortion, stillbirth, and multiple pregnancies, and those with missing data on the sex of the previous child were excluded. Altogether, 62 718 women were included. For the first live birth, a male-biased sex ratio of 1.055 was observed. Further, no significant difference was found in the sex ratio of the conceived child between women with one boy and those with one girl previously. However, when there were more than two children previously, the subsequently conceived child’s male/female sex ratio was significantly higher among boy-only mothers than among girl-only mothers. The results indicated that several pregnant women are biased toward conceiving either boys or girls.
format Online
Article
Text
id pubmed-10289377
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher Public Library of Science
record_format MEDLINE/PubMed
spelling pubmed-102893772023-06-24 Pregnancy bias toward boys or girls: The Japan Environment and Children’s Study So, Shuhei Tawara, Fumiko Taniguchi, Yu Kanayama, Naohiro PLoS One Research Article The sex of the conceived child is a significant concern for parents. To verify whether there women have pregnancy bias toward boys or girls, we investigated whether the history of continuous same-sex pregnancy was associated with the subsequent child’s sex. We prospectively analyzed data from the Japan Environment and Children’s Study, a birth cohort study. We included all cases of singleton live births (n = 98 412). Women with pregnancy due to infertility treatment were excluded (n = 6255); Similarly, women with a history of miscarriage, artificial abortion, stillbirth, and multiple pregnancies, and those with missing data on the sex of the previous child were excluded. Altogether, 62 718 women were included. For the first live birth, a male-biased sex ratio of 1.055 was observed. Further, no significant difference was found in the sex ratio of the conceived child between women with one boy and those with one girl previously. However, when there were more than two children previously, the subsequently conceived child’s male/female sex ratio was significantly higher among boy-only mothers than among girl-only mothers. The results indicated that several pregnant women are biased toward conceiving either boys or girls. Public Library of Science 2023-06-23 /pmc/articles/PMC10289377/ /pubmed/37352332 http://dx.doi.org/10.1371/journal.pone.0287752 Text en © 2023 So et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
So, Shuhei
Tawara, Fumiko
Taniguchi, Yu
Kanayama, Naohiro
Pregnancy bias toward boys or girls: The Japan Environment and Children’s Study
title Pregnancy bias toward boys or girls: The Japan Environment and Children’s Study
title_full Pregnancy bias toward boys or girls: The Japan Environment and Children’s Study
title_fullStr Pregnancy bias toward boys or girls: The Japan Environment and Children’s Study
title_full_unstemmed Pregnancy bias toward boys or girls: The Japan Environment and Children’s Study
title_short Pregnancy bias toward boys or girls: The Japan Environment and Children’s Study
title_sort pregnancy bias toward boys or girls: the japan environment and children’s study
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10289377/
https://www.ncbi.nlm.nih.gov/pubmed/37352332
http://dx.doi.org/10.1371/journal.pone.0287752
work_keys_str_mv AT soshuhei pregnancybiastowardboysorgirlsthejapanenvironmentandchildrensstudy
AT tawarafumiko pregnancybiastowardboysorgirlsthejapanenvironmentandchildrensstudy
AT taniguchiyu pregnancybiastowardboysorgirlsthejapanenvironmentandchildrensstudy
AT kanayamanaohiro pregnancybiastowardboysorgirlsthejapanenvironmentandchildrensstudy
AT pregnancybiastowardboysorgirlsthejapanenvironmentandchildrensstudy