• Reproductive and Developmental Biology
• /
• v.38 no.1
• /
• pp.9-19
• /
• 2014

For successful embryo implantation, the communication of the maternal endometrium with the conceptus trophectoderm is required essentially. In pigs, conceptuses undergo morphological change in length to enlarge the physical contact area with the maternal endometrium and secrete estrogen to induce the maternal recognition of pregnancy during the peri-implantation period. Conceptus-derived estrogen prevents luteolysis by conversion in direction of $PGF_{2{\alpha}}$ secretion from the uterine vasculature to the uterine lumen as well as it affects on expression of the uterine endometrial genes. In addition to estrogen, conceptuses release various signaling molecules, including cytokines, growth factors, and proteases, and, in response to these signaling molecules, the maternal uterine endometrium also synthesizes many signaling molecules, including hormones, cytokines, growth factors, lipid molecules, and utilizes ions such as calcium ion by calcium regulatory molecules. These reciprocal interactions of the conceptus trophectoderm with the maternal uterine endometrium make development and successful implantation of embryos possible. Thus, signaling molecules at the maternal-conceptus interface may play an important role in the implantation process. This review summarized syntheses and functions of signaling molecules at the maternal-conceptus interface to further understand mechanisms of the embryo implantation process in pigs.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.13 no.8
• /
• pp.3532-3536
• /
• 2012

Understanding of the maternal transcriptome increased to elucidate the underlying molecular mechanism of normal oocyte maturation, which depends on a precise sequence of changes in maternal genes expression. Previous reports that the translational potential of a maternal mRNA is generally determined by the length of the poly(A) tail, and deadenylation is usually the first sign of mRNA degradation. However, in vitro cultured system has the underlying molecular mechanisms remain unclear. We determined whether the role of molecular basis, four important maternal genes, C-mos, cyclin-B1 (regulatory subunit of MPF), BMP15 and GDF9, were selected for detection of their precise mRNA expression patterns by real-time PCR and for determination of their polyadenylation status by poly(A) tail PCR during oocyte maturation. In the present study. the abnormal expression of maternal mRNAs prior to zygotic genome activation, which results in suppression of the corresponding protein level, may be responsible for, at least in part, a profound defect in further embryonic development. Reasonable expression of maternal gene is crucial for proper oocyte maturation and further embryonic development.

• Human Ecology Research
• /
• v.60 no.1
• /
• pp.99-113
• /
• 2022

This study examined the effect of maternal cognitive empathy on children's executive function focusing on mediating effects of preschooler's caring behavior and happiness. The subject of this study was 460 five-year-old preschooler-their mother dyads in Korea. Data were collected by Korean Version of Questionnaire of Cognitive and Affective Empathy(K-QCAE), Caring Behaviors Scale for Young Children, Happiness Scale for Young Children and Behavior Rating Inventory of Executive Function-Preschool Version(BRIEF-P). Data were analyzed using descriptive statistics, independent samples t-test, Pearson correlation analysis, structural equation model and bootstrapping test with SPSS 25.0 and AMOS 23.0 program. The major results were as follows. 1) Maternal cognitive empathy had a positive influence on preschooler's caring behavior. 2) Preschooler's caring behavior had a positive influence on happiness and executive function. 3) Preschooler's happiness had a positive influence on executive function. 4) The effect of maternal cognitive empathy on preschooler's executive function was mediated by preschooler's caring behavior. 5) The effect of maternal cognitive empathy on preschooler's executive function was sequentially mediated by preschooler's caring behavior and happiness. This study revealed that maternal cognitive empathy, preschooler's caring behavior, and happiness have an important role in preschooler's executive function. Most of all, we suggest that maternal cognitive empathy should be improved to promote preschooler's executive function. The findings of this study will contribute to designing intervention programs to improve preschooler's executive function as well as maternal empathy.

• Korean Journal of Childcare and Education
• /
• v.12 no.6
• /
• pp.207-226
• /
• 2016

The purpose of this study was to analyze the effects of parenting beliefs and maternal gatekeeping on father's parenting involvement. The participants were comprised of 459 Korean and Chinese couples with children whose ages ranged from 3 to 5 years old. The subjects completed questionnaires on the BCPRS (Beliefs Concerning the Parental Role Scale), the PRI (Parental Regulation Inventory), and the parenting involvement sub-scale of the productive father's parenting scale. The main results were as follows. First, in the father's parenting involvement sub-scale, Korean fathers showed a higher value compared to Chinese fathers. Second, Korean mothers had non-traditional parenting beliefs than the Chinese mothers had. Third, in regards to maternal gatekeeping, Chinese mothers more frequently controlled father's parenting than Korean mothers. Fourth, it was found that parenting beliefs and maternal gatekeeping in both countries had a significant influence in father's parenting involvement.

• Journal of the Korean Home Economics Association
• /
• v.49 no.1
• /
• pp.17-25
• /
• 2011

This study examined the impact of academic achievement and maternal differential treatment on academic self-concept among adolescent siblings. The sample consisted of 438 students attending middle schools in Seoul (M = 15.2 yrs.), who had a sibling. Data were analyzed using Structural Equation Modeling. Academic achievement compared with a sibling and maternal differential treatment had direct effects on academic self-concept, indicating that children with higher academic achievement scores than their sibling and with perceived maternal differential treatment reported a significantly higher academic self-concept. Also, the relationship between academic achievement as compared with a sibling and academic self-concept was mediated by maternal differential treatment. These findings could be used in educational settings as a basis for improving the academic self-concept of early adolescents.

• Journal of Families and Better Life
• /
• v.24 no.5 s.83
• /
• pp.239-249
• /
• 2006

The main purpose of this study was to examine the relations of children's shyness and maternal involvement in children's peer relations to children's social competence, and the relative influence of children's shyness and maternal involvement in children's peer relations on children's social competence. 195 mothers of 3-year-olds and their 13 teachers in Seoul and Gyeonggi province participated in the study. The data were obtained using three kinds of questionnaires regarding shyness, parental involvement, and social competence. Findings revealed that shy children showed less popularity leadership and social participation for both boys and girls. The more orchestrations mothers exerted, the more popularity leadership boys showed. And the more advice and support mothers provided, the more interpersonal adjustment girls showed. For boys, shyness was more influential on popularity leadership than maternal orchestrations were. Findings are discussed in terms of the role of shyness in children's early social competence for both boys and girls.

• Journal of Korean Public Health Nursing
• /
• v.32 no.3
• /
• pp.376-387
• /
• 2018

Purpose: This study was conducted to assess the breast feeding rate and maternal adaptation of mothers with infants and children in early childhood in a community. Methods: This descriptive study was conducted from November to December 2015, and included a total of 283 mothers of infants and children in early childhood. The data were analyzed using descriptive analysis, the ${\chi}^2-test$, and one way ANOVA. Results: The rates of breast feeding after birth were 76.3% (1 month postpartum), 69.3% (3 months postpartum), 53.4% (6 months postpartum), 32.2% (9 months postpartum), and 22.6% (12 months postpartum). The level of maternal adaptation of subjects was $3.78{\pm}0.54$. Subjects who were breastfed until 9 months postpartum had a higher level of maternal adaptation than those who stopped breast feeding at 1 month postpartum (F=3.926, p<.002). The breast feeding rate of subjects who were educated about breast feeding after childbirth was significantly higher than that of those who did not receive breast feeding education after delivery. Conclusion: To increase the breast feeding rate and maternal adaptation, community health nurses should develop and provide breast feeding programs to mothers soon after childbirth.

• Korean Journal of Child Studies
• /
• v.35 no.4
• /
• pp.145-165
• /
• 2014

The main purpose of this study was to examine the relationships between marital conflict, parental control and children's depression. The participants were composed of 243 elementary school 5th and 6th graders (of which 121 were boys and 122 were girls) from Gyeonggi-do province. They completed questionnaires on marital conflict, parental control and children's depression. The data were analyzed by means of Pearson's correlation coefficients and multiple regression analysis. It was observed that marital conflict (content) had an effect on children's depression. Parental psychological control was also found to have an effect on children's depression. However, parental behavioral control did not appear to have an effect on children's depression. In addition marital conflict (frequency/content) had an effect on parental psychological control. Additionally, marital conflict (resolution) had an effect on parental behavioral control. It was further found that paternal psychological control and maternal psychological control partially mediated the relationship between marital conflict and children's depression. These results clearly indicate that parental psychological control plays an important role in marital conflict and children's depression.

• Journal of Families and Better Life
• /
• v.27 no.5
• /
• pp.195-206
• /
• 2009

The main purpose of this study was to examine the effects of maternal achievement pressure and emotional support on adolescents' achievement motivation. A total of 241 adolescents in the second grade of two middle schools in Seoul and their mothers participated in the study, and completed questionnaires on mothers' achievement pressure and emotional support. Adolescents also answered a questionnaire on achievement motivation. Sohn's(1997) Achievement Pressure Scale, Sung's(1993) Social Support Scale and Hermans'(1970) Prestatie Motivatie Scale were used for this survey. Data were analyzed by Pearson's correlation coefficients, t-tests, regressions, and one-way ANOVA with Duncan's multiple range tests. Results showed that maternal achievement pressure and emotional support and adolescents' achievement motivation did not vary as a function of sex. Maternal achievement pressure and emotional support had positive effects on achievement motivation of adolescents, and maternal achievement pressure played a more influential role on the motivation of adolescents than emotional support. Among four groups divided by the level of maternal achievement pressure and emotional support, high/high, high/low, low/high, and low/low, adolescents in the high/high group were perceived to have the highest achievement motivation. Findings suggest that both maternal achievement pressure and emotional support are important in improving adolescents' achievement motivation.

• Human Ecology Research
• /
• v.59 no.2
• /
• pp.233-243
• /
• 2021

This study examined the longitudinal effects of media usage by early school-age children and of maternal parenting stress on children's school adjustment. The study focused on the mediating effect of executive function difficulty. Longitudinal data to examine the hypothetical model were drawn from the eighth (2015) through tenth (2017) waves of the Panel Study of Korean Children (PSKC) collected by the Korea Institute of Child Care and Education (KICCE). A total of 581 children (293 boys and 288 girls) and their mothers were included. Confirmatory factor analysis, structural equation model, and bootstrapping analysis were applied using SPSS 25.0 and Amos 26.0. The results are as follows. First, no significant correlation was found between early school-age children's media usage and maternal parenting stress. Second, neither media usage by early school-age children nor maternal parenting stress were found to directly affect children's school adjustment. Third, media usage by early school-age children and maternal parenting stress were shown to indirectly affect children's school adjustment via executive function difficulties. In other words, higher levels of media usage by early school-age children and maternal parenting stress during the first grade lead to greater executive function difficulties after a year, which, in turn, lead to a lower level of school adjustment in the third grade. This study indicates the need to develop practical support for the psychological wellbeing of mothers while they are performing their role as a parent and for children in maintaining suitable levels of media usage during early childhood.