Knowledge may be even more powerful than the adage implies: It could help reduce postpartum depression in mothers, according to researchers in Japan. Postpartum depression is on the rise in Japan, especially as the cultural norm of traditional support systems comprising grandparents and other relatives shift to more contained, nuclear groups, especially in more urban areas.
“Mothers in urban Japan are at a high risk for postpartum depression,” said Yoko Shimpuku, professor in the Graduate School of Biomedical and Health Sciences at Hiroshima University. “We found that a two-hour course, called Help, Understanding, Guidance (HUG) Your Baby, significantly reduced that risk and increased parental confidence.”
Shimpuku and the multi-institutional team’s study results, originally made available online in December of 2021, were published in the November 2022 issue of Women and Birth.
“In Japan, as in other countries, it often is the responsibility of midwives to educate both mothers and their partners about infant behavior and parenting, so that both can parent with confidence,” Shimpuku said, noting that Japan’s Ministry of Health, Labor and Welfare recently reported that while mothers in Japan parent about seven and a half hours a day, fathers only parent about an hour per day. This is the lowest rate among developed countries. “Understanding a baby’s behavior has been shown by previous studies to increase parenting confidence, maternal self-efficacy and father’s participation in parenting — and enhance parent-infant interaction, infant development and breastfeeding duration.”
The HUG Your Baby program was developed by Jan Tedder, a family nurse practitioner and lactation consultant in the United States, to help parents understand their baby’s behavior and is currently in use around the world. Shimpuku and co-author Mariko Iida, of Yokohama City University, translated the program into Japanese and introduced it to health care providers and university midwifery students in 2013. Since then, Shimpuku said, it has been well-received by clinicians and mothers alike, but it has not been rigorously assessed beyond perception.
“In this study, we examined whether differences might be found, using standardized measures of maternal psychology, between mothers who received HUG Your Baby teaching and mothers who did not,” Shimpuku said. “We found that the program, administered prenatally, has positive effects on preventing postpartum depression and increasing parenting confidence.”
More than 220 women were recruited to the study between February 2015 and February 2016, split by timing to avoid cross-contamination between the control and intervention groups. The control group received regular prenatal treatment and a leaflet with some more information, while the intervention group participated in a two-hour course consisting of a lecture about how to recognize and respond to a baby’s behavior — including sleep-wake cycles — and hands-on learning with a doll. The intervention group also received information about breastfeeding.
“Participants completed standardized scales on postnatal depression and parenting confidence, as well as answered questions demonstrating knowledge of baby’s behavior at one and three months postpartum,” Shimpuku said. The participants’ scores in both groups at one month indicated that they were at a higher risk for postpartum depression than a national survey, but the intervention’s group was lower than the control’s score. “It can be said that the HUG Your Baby intervention decreased maternal depression in high-risk mothers living in urban Japan.”
The intervention group also had more confidence at one month, which persisted at three months, at which point the control group caught up. This is particularly interesting, according to Shimpuku, since the intervention group had more first-time mothers as pregnant women who already had children were less likely to have the time to attend the course.
“Though ‘live’ classroom teaching, as utilized in the present study, enhances social connections and promotes hands-on learning, the COVID-19 pandemic caused HUG Your Baby to broaden its outreach efforts beyond face-to-face encounters,” Shimpuku said. “The growing research base for this program suggests that it should be continued, expanded (perhaps with a greater virtual component) and more closely studied by other researchers to better understand and develop its proven potential to increase positive parenting experiences, both in Japan and elsewhere in the world.”
Co-authors include Naoki Hirose, Hiroshima University; Mariko Iida, Yokohama City University; Kyoko Tada, St. Luke’s International Hospital; Taishi Tsuji, Tsukuba University; Anna Kubota, Keio University; Yurika Senba, St. Luke’s Maternity Care and Birth Clinic; Kumiko Nagamori, Setagaya Postpartum Care Center; and Shigeko Horiuchi, St. Luke’s International University.
The St. Luke’s Life Science Research Center Grant in Japan funded this research, but had no role in the study design, data collection or analysis, writing of the report or the submission process.
About Hiroshima University
Since its foundation in 1949, Hiroshima University has striven to become one of the most prominent and comprehensive universities in Japan for the promotion and development of scholarship and education. Consisting of 12 schools for undergraduate level and 4 graduate schools, ranging from natural sciences to humanities and social sciences, the university has grown into one of the most distinguished comprehensive research universities in Japan.
English website: https://www.hiroshima-u.ac.jp/en