Child abuse is a globally prevalent problem, and its numbers have continuously increased in Japan over the past 30 years. Prevention of child abuse depends on the support available to pregnant and postpartum women from the time of pregnancy. Public health nurses and midwives are expected to provide preventive support in cooperation, as they can support pregnant and postpartum women from close proximity and recognize their health problems and potential signs of child abuse. This study aimed to deduce the characteristics of pregnant and postpartum women of concern, as observed by public health nurses and midwives, from the perspective of child abuse prevention. The participants comprised ten public health nurses and ten midwives with five or more years of experience working at the Okayama Prefecture municipal health centers and obstetric medical institutions. Data were collected through a semi-structured interview survey and analyzed qualitatively and descriptively using an inductive approach. The characteristics of pregnant and postpartum women, as confirmed by public health nurses, included four main categories: having “difficulties in daily life;” “a sense of discomfort of not feeling like a normal pregnant woman;” “difficulty in child-rearing behavior;” and “multiple risk factors checked by objective indicators using an assessment tool.” The characteristics observed by midwives were grouped into four main categories: “mental and physical safety of the mother is in jeopardy;” have “difficulty in child-rearing behavior;” “difficulties in maintaining relationships with the surrounding people;” and “multiple risk factors recognized by an assessment tool.” Public health nurses evaluated pregnant and postpartum women’s daily life factors, while midwives evaluated the mothers’ health conditions, their feelings toward the fetus, and stable child-rearing skills. To prevent child abuse, they utilized their respective specialties to observe those pregnant and postpartum women of concern with multiple risk factors.