Sent_en: 2zh Whether this correlation be attributed to nature through the prenatal effects of the womb or to nurture through the psychosocial effects of growing up with elder siblings, however, remained unclear.
Sent_yy: 然而，这种关联是通过子宫的产前效应形成的，还是通过与年长的哥哥姐姐一起成长的心理社会效应形成的，目前还不清楚。