The purposes of this study were: (1) to adapt two validated questionnaires used to evaluate maternal confidence (KPCS-IT) and maternal stress (PSS-IT) to the Italian context, in order to (2) measure the stress level and the self-efficacy in an Italian sample of mothers. The validation process has provided the construction of an online questionnaire. It was administered on a convenience mothers sample with at least a child aged 0–12 months, twice (T0 and T1) with a two day interval. Assessment of instrument stability over time was estimated by applying test–retest reliability between T0 and T1, and the Cronbach’s alpha coefficient. A cross-sectional study was carried out to assess the second aim. Italian mothers with at least one child living at home aged between 0–12 months were recruited. Statistical reliability methods were applied to assess the internal validity of the two questionnaires. PSS-IT was analyzed using univariate and multivariate statistical analyses in order to study the association between KPCS-IT, demographic and maternal characteristics. Statistical significance was established as p < 0.05. The Cronbach’s alpha reported a good level of internal consistency of the questionnaires: PSS-IT alpha = 0.862; KPCS-IT alpha = 0.801. 32% of the mothers declared low maternal confidence and the mean value of PSS-IT was 35.4 (SD = 8). The significant inverse correlation was found between the PSS-IT and the KPCS-IT (coeff = −0.353; p < 0.001): this means that a high level of perceived self-efficacy reduces the maternal stress level. The study identifies that interventions on maternal confidence can be useful to support mothers in the first months after delivery in order to prevent stress risk: the perceived self-efficacy is as a modifiable factor and the results of the study indicate that it significantly reduces the PSS-IT and EPDS scores. In future, more field trials are necessary in order to assess the realistic and feasible interventions on maternal confidence and competence to prevent maternal distress.

Background: Fear or mistrust of the vaccine and concern for the well-being of their unborn infants are the main reasons for COVID-19 vaccine hesitancy in pregnant women. The aim of this work was to validate a questionnaire on knowledge about COVID-19 vaccination during pregnancy and to examine the sources of information in a group of new mothers, as well as their effectiveness and intelligibility. Methods: A literature review was carried out to develop a questionnaire of forty-five questions, divided into six sections, called MAMA-19. The assessment of agreement and the interrater reliability was carried out using Cronbach’s analysis and Cohen’s kappa statistic. Data obtained from the questionnaire were analysed using descriptive and univariate statistics. Results: The total alpha values in the two sections about knowledge of vaccination during pregnancy and about the effects of disease and possible post-COVID-19 consequences for the unvaccinated showed sufficient consistency, at 0.860 and 0.725, respectively. Non-vaccinated women thought that receiving the COVID-19 vaccine during pregnancy can lead to malformations in the newborn (60% vs. 40%, p = 0.002) and to an increased risk of foetal growth restriction (61.9% vs. 38.1%, p < 0.001). The percentage of vaccinated women was significantly higher than non-vaccinated when more than one professional was consulted and consistent information was received from them (74.2% vs. 25.8%, p = 0.008). Conclusion: The MAMA-19 questionnaire shows results in line with the literature and valid in the two main sections. It is quick to use for measuring communication effectiveness by healthcare professionals and institutions in the context of the COVID-19 vaccination campaign in the pregnant population. The results evidence that a physician’s recommendation to get vaccinated is the most important factor in maternal decision making, regardless of geographic, social or educational context.