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To clarify the changes in milk microbiota by lactation stage, i.e., d ays in milk (DIM) for Fresh of 0 to 21, Early (DIM of 22 to 80), Middle (DIM of 81 to 200), and Late (DIM 201 or more) lactation stages in dairy cows, we performed longitudinal (12 sampling at each stage, total 48 samples) and cross-sectional sampling (Fresh [n = 7], Early [n = 12], Middle [n = 11], and Late [n = 11] stages, total of 41 samples) to comprehensively analyze the microbiota in milk samples by 16S rRNA amplicon sequencing. Although the relative abundance of bacteria of the phylum Actinobacteria increased significantly in the Late lactation stage in the longitudinal study, no significant changes were observed in the cross-sectional study. While no changes were observed in the milk microbiota during the lactation stages, environmental factors appeared to have a comparatively larger impact than interindividual diversity on the composition of the milk microbiota. Furthermore, the findings illustrated the importance of selecting appropriate study designs to clarify changes in milk microbiota throughout the lactation period. The findings obtained in this study not only provide useful information for interpreting previous research results, but also provide knowledge that could be helpful when designing new studies.

Previous studies have not focused on how intimate partner violence (IPV) during pregnancy predicts early postnatal child abuse. This study identifies the continuity and spillover effects of IPV during pregnancy on IPV and child abuse and neglect (CAN) at 1-month and 3-month postnatal periods. A total of 822 pregnant women were recruited at the third trimester of pregnancy at two obstetric hospitals in Tokyo, Japan, from June 2016 to September 2017. IPV during pregnancy and IPV and CAN at 1 month and 3 months postnatal were obtained through self-reported questionnaires. Results show that the rate of IPV was highest during pregnancy (16.4%), and there was significant continuance (69.4%) of this occurrence of IPV after childbirth (1 month: 13.9%; 3 months: 13.7%). In addition, the rate of CAN was 20.0% at 1 month postnatal and slightly increased at 3 months postnatal (21.8%). Furthermore, this study indicates that IPV during pregnancy was significantly associated with CAN at 1 month and 3 months postnatal (β =.16 and β =.14) and with IPV at 1 month (β =.68), and subsequently, IPV at 1 month was significantly associated with IPV at 3 months postnatal (β =.56). This study suggests the importance of conducting screenings for IPV during the perinatal period and providing intensive health interventions for abused women to support their parenting from pregnancy to 3 months postnatal to prevent or reduce CAN at 1 month and 3 months postnatal. [ABSTRACT FROM AUTHOR]

Aim: This study identifies the impact of intimate partner violence (IPV) during pregnancy, and childhood maltreatment on mothers' perpetration of child maltreatment on 1‐month postnatal infants. Methods: A longitudinal study was conducted on women in the third trimester of pregnancy in two obstetric hospitals in Tokyo, Japan, from June 2016 to September 2017. Participants were asked to complete online self‐reported questionnaires during their pregnancy period and at 1 month postnatal. The relationship between suffering from IPV during pregnancy, experiencing childhood maltreatment before the age of 18 years, and perpetration of child maltreatment toward infants was measured among mothers using the Violence Against Women Screen and a survey of four and 14 ad hoc questions. To identify the impact of poly‐victimizations of IPV and childhood maltreatment on maternal–infant maltreatment, the study implemented logistic regression models. Results: The data from 533 respondents to the first and second surveys were analyzed. Maternal–infant maltreatment at 1 month postnatal was strongly associated with poly‐victimizations of IPV during pregnancy and childhood maltreatment (adjusted odds ratio [AOR] = 5.17; p <.001; 95% CI = 2.39–11.20), single victimization of IPV (AOR = 3.43, p <.001, 95% CI = 1.76–6.72), and single victimization of childhood maltreatment (AOR = 1.75, p =.03, 95% CI = 1.04–2.93; neither = reference). Conclusion: The results emphasize the importance of individuating pregnant women with poly‐victimizations of IPV during pregnancy and childhood maltreatment and providing intensive and continuous support for such women to prevent maternal–infant maltreatment after childbirth. [ABSTRACT FROM AUTHOR]