• Journal of Animal Science and Technology
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• v.49 no.2
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• pp.239-244
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• 2007

This study was conducted to investigate effects of weaning age on growth perforance, feed intake, disease occurrence and maternal reproductive efficiency in Hanwoo. Sixty experimental calves were allocated into two groups, early weaned (n=29, calf age 90 d, EW) and normally weaned (n=31, calf age 120 d, NW). Body weights and average daily gains during nursing and post-weaning periods were similar between two groups (p>0.05). Weaning age had no effect on calf starter, grass hay, dry matter, crude protein and TDN intakes of calves (p>0.05). Maternal calving interval in EW was shortened by 23 days compared to NW (p>0.05). Any difference in occurrence of disease was not observed between groups. Present results indicate that early weaning age has no negative effects on growth performance, feed intake or on disease occurrence in Hanwoo calves. And it has positive influence on maternal calving interval.

• Clinical and Experimental Pediatrics
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• v.50 no.10
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• pp.954-958
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• 2007

Purpose : The purpose of this study was to identify factors influencing premature infants who are small for their gestational ago. Methods : The medical records of 1,010 premature infants of 26 to 35 weeks of gestational age born at Il-Sin Christian Hospital, Busan from January 2000 to August 2006 were reviewed. We collected data on gestational age, birth weight, infant gender, birth order, maternal age and previous abortion history and analyzed the factors influencing premature infants who were small for their gestational ago at birth. Results : In our study more female than male (P=0.042) in premature infants who were small for their gestational ago were born from mothers aged younger than 20 or older than 35 (P=0.041). But association between smallness for gestational age and birth order or maternal previous abortion history was statistically insignificant (P=0.228, P=0.129). Conclusion : Considering the association of birth weight and the survival rate of premature infants, it is thought that maternal age had an influence on the survival rate of premature infants. Social and political support to lower the teenager pregnancy and older pregnancy is expected to increase the survival rate of premature infants and the birth of healthy normal neonates.

• The Journal of Korean Medicine
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• v.38 no.1
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• pp.112-124
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• 2017

Objectives: The purpose of this study is to investigate the various postpartum symptoms and the relevant factors. So it can provide fundamental data about postpartum health care. In conclusion, we can prevent and manage the postpartum disease by using this data. Methods: The subject of the present study was 94 women (63 women who completed vaginal delivery and 31 women who delivered by cesarean section) who completed labor between November 1, 2013 and January 31, 2016, at the clinic of OB&GYN. They have been taking good care of their health at postpartum clinic in Andong Woori Women Hospital. We investigated the various symptoms and situation which occurred from the moment of hospital to postnatal admission health care period, and Korean medical doctor examined the patients through the four examination methods. We classified the symptoms by maternal age, the frequency of maternal childbirth, the method of delivery, the delivery season, the term of pregnancy, the body weight of infant, the weight change of mother and the way of feeding. Results: There were no remarkable corelation in the frequency of symptoms according to maternal age, the way of delivery, the delivery season, the change of weight before and after of delivery, gestational weeks at delivery, the manner of feeding and the body weight of infants except for the frequency of maternal childbirth. Conclusion: The symptoms of hemorrhoids, the feeling of coldness and chilliness increased with increasing the frequency of maternal childbirth. Other circumstances, there was no relationship with symptoms of postpartum.

• Journal of Korean Academy of Rural Health Nursing
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• v.3 no.2
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• pp.104-115
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• 2008

Purpose: A study of the family planning and Maternal-Child Health Services that disciplined itself in primary health care post form 1980 to 2009. Method: Investigation studies family planning in primary health care post and a change process of a Maternal-Child Health Services into case by case until 2009 from 1980. Results: Our country family planning business began at economic development dimensions in order to solve a poverty issue. This business goal were childbirth decrease of pregnancy possibility couple aged 19~49 and improve to mother and child health. For this goal, all kinds of health education included sex education and contraception education, contraception service, comprehensive maternal and child health service that management of front and back of childbirth etc. are provided. According to fail down a birthrate from 6.0(1962) to 1.25(2009), the nation reached to a dilemma called childbirth encouragement policy. Conclusions: Decrease of labor supply by low birthrate, decrease numerical an employed person by aging was brought a labor shortage and decrease of productivity of labor of industrial manpower. Deterioration phenomenon of financial income and expenditure by consumption and investment contraction caused decrease of slowdown of economic growth and potential growth rate, and a social cost burden is increased by deterioration financial old man support burden increase by this and pensions and health insurance, a sharp increase of social welfare cost etc. Now, in order to solve a low birth issue, the government establishes a whole nation forwarding system and establishes basic plan social low birth and advanced age, and to prepare for childbirth fault factors removal and advanced age society shall endeavor.

• Journal of dental hygiene science
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• v.17 no.3
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• pp.250-256
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• 2017

The purpose of this study was to examine the influence of maternal socioeconomic status, maternal oral health behaviors, and oral health behaviors of children, on the prevalence of early childhood caries in children aged 5 years. The Korean National Health and Nutrition Examination Survey data collected between 2007 and 2014 were applied to this study, and the study sample included 824 children who received oral examinations and participated in the health behavior survey. The factor that affected the prevalence of early childhood caries were confirmed by maternal and child factors. The data were analyzed using multiple linear regression. The mothers' age, income level, and job status affected the prevalence of early childhood caries. There was a significant difference in the analysis considering the factors of motherhood and children in the prevalence of early childhood caries according to mother's age, education level, income level, and the child's oral examination. The prevalence of early childhood caries was higher in children who received oral examinations than in those who did not. When the mother's educational level was higher than college education, it was found that the index of child, i.e., there was a difference in the prevalence of early childhood caries according to the mother's educational and income levels. These results indicate that maternal socioeconomic characteristics are correlated with the oral health of children. Therefore, oral health education programs that include mothers for the prevention of early dental caries in children may improve the dental health of children. In addition, specific oral health policies are necessary to address the differences in the oral health between the income groups.

• Korean Journal of Childcare and Education
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• v.10 no.1
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• pp.111-129
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• 2014

This study investigated the effects of maternal acceptance attitudes towards children's emotional expressiveness and children's emotional intelligences on peer interaction. A total of 145 Korean mothers with children from 3-5 years old and children's teachers were selected from 4 kindergartens and 6 daycare centers in Incheon and Kyunggi areas. The results were as follows. First, generally, children's emotional intelligence was significantly different depending on gender of the children. Second, there was no difference based on age and gender in maternal acceptance attitudes towards a child's positive emotional expressiveness, but there was a difference based on gender in maternal acceptance attitudes toward a child's negative emotional expressiveness. Third, the children's positive peer interaction was significantly different depending on gender of the children, but the children's negative peer interaction was significantly different based on age and gender of the children.

• Journal of Korean Academy of Nursing
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• v.47 no.6
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• pp.854-863
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• 2017

Purpose: The present study is a descriptive cross-sectional study of cause-and-effect relationship, which used the $7^{th}$ year data of the Panel Study on Korean Children, to investigate the effects of parenting stress, depression, and family interactions of the parents of early school-age children on children's subjective happiness. Methods: The present study included data of 1419 pairs of parents who participated in the mother and father survey of the Panel Study on Korean Children. The effects of parenting stress, depression, and parental family interactions on children's subjective happiness were analyzed as actor and partner effects using path analysis. Results: Parenting stress had an actor effect on depression; maternal parenting stress (${\beta}=-.21$, p<.001) and depression (${\beta}=-.30$, p<.001) had an actor effect on maternal family interaction; and paternal parenting stress (${\beta}=-.18$, p<.001) and depression (${\beta}=-.17$, p<.001) had a partner effect on maternal family interaction. Paternal parenting stress was found to have an actor effect on paternal family interaction (${\beta}=-.30$, p<.001), and parental depression was found to have actor effect (${\beta}=-.23$, p<.001) and maternal depression had a partner effect on paternal family interactions (${\beta}=-.22$, p<.001). Children's subjective happiness was found to have a statistically significant relationship with maternal family interaction (${\beta}=.40$, p<.001). Conclusion: The significance of the study is in its provision of basic data for adjusting parents' family interactions that are closely related to the growth and development of children by confirming the effect of parents' parenting stress, depression, and family interaction on children's subjective happiness.

• Korean Journal of Veterinary Service
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• v.23 no.3
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• pp.271-279
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• 2000

This study was carried out to provide the fundamental information for development of proper vaccination program against infectious bursal disease(IBD) to the local chicken farms. The antigen detection was peformed from 8 samples of bursa of Fabricius with agar gel precipitation(AGP) and indirect immunofluorescent assay(IFA), And also, the antibodies in serum samples were detected by the various serological methods such as commercial ELISA assay, AGP and virus neutralization(VN) test. 1. The antigen detection rates were 25% for AGP which is 2 out of 8 farms and 10 out of 40 bursas, and 25% which Is 2 out of 8 farms and 20% 8 out of 40 bursas for IFA, respectively. 2. The mean titer of maternal antibody (>3,000) existed until 10 days of the age with ELISA-GMT. 3. The antibody positive rates which are over 80% showed until 5 days of the age with ELISA and at 10 days of the age with AGP except one, but none of them showed from 1 day of the age. This report came to conclusions that both the protective maternal antibody titers and the antigen positive rates were significant until at the 10 days of the age.

• Journal of Preventive Medicine and Public Health
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• v.36 no.2
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• pp.117-124
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• 2003

Objectives : This study was performed to examine the relationship between maternal exposure to environmental tobacco smoke (ETS) and pregnancy outcomes (low birth weight or preform baby) in a prospective cohort study. Methods : We made a pregnant women's cohort, and followed the pregnancy outcomes, between May 1st 2001 and August 31st 2002. We surveyed 2,250 women who visited our hospital during their 35th gestational week, with a self-administered questionnaire. The final total of mother-infant pairs analyzed in this study was 1,712. We used a multiple logistic regression analysis to analyze the effect of maternal ETS on the incidence of preform or low birth weight, and a linear regression analysis for the birth weight and gestational age. Results : Higher exposure to ETS (>=1 hours/day) during pregnancy was more negatively associated with the gestational age and birth weight, than no exposure to ETS (no or less than 1 hour). Maternal exposure to ETS was associated with preform baby(adjusted odds ratio (AOR) 1.7; 95% confidence interval (CI) 0.9, 3.3) and low birth weight (AOR 2.3; 95% CI 0.9, 5.5). In addition, we found that maternal ETS may reduce the birth weight by 70g after adjusting for potential confounding factors. Conclusions : This study suggests that maternal exposure to ETS during pregnancy may increase the frequency of low birth weights and preform births.

• Journal of Preventive Medicine and Public Health
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• v.17 no.1
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• pp.251-257
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• 1984

Low birth weight baby, defined as the baby born with less than or equal to 2,500g of body weight by WHO has been a great concern in the fold of maternal and child health since the low birth weight is a major cause of high perinatal mortality. Any measure to prevent the low birth weight baby is most desirable not only for saving the life of a baby but also for levelling up the health of the whole society. The authors attempted to figure out how some known maternal risk factors are related to the low birth weight and to measure their strengh of associations in terms of relative risk using hospital birth records. For this study, hospital birth records of 66 low birth weight cases and sex-parity matched 198 normal controls were chosen from Kangnam St. Mary's Hospital, Catholic Medical Center, and the data were analyzed in regards to several maternal factors. The risk factors studied were mother's age, mother's ABO blood type, previous histories of abortion, low birth weight baby, fetal wastage, and maternal diseases represented by anemia, hypertension, proteinuria, and glucosuria. The results obtained in this study were as follows: 1. The mean body weight of the cases and controls were 1,955g and 3,251g, respectively, and the heights were 41cm for cases and 50cm for controls. Mean gestation periods of cases and controls were 34 weeks and 39 weeks, respectively. 2. Young mother(less than or equal to 20 years of age) or old mother(more than or equal to 30 years of age) experienced more frequently the delivery of low birth weight babies than mothers in between 21 and 29 years of age. But the difference was not statistically significant. 3. Mothers whose blood type was O tended to have slighty higher frequency of low birth weight babies while B mothers have lower frequency. But the difference was not statistically significant too. 4. Those mothers who had experienced low birth weight baby in the past tended to give more births of low birth weight babies. This factor is even statistically significant and the relative risk of the prior experience of low birth weight was 6.7. 5. Mothers with experience of fetal losses and mothers of more than two pregnancies had higher frequency of low birth weight than the mothers with no fatal losses and of first pregnancy, but the difference was not statistically significant. 6. Statistically significant higher frequency of low birth weight were found in mothers with hypertension(odds ratio=4.07), anemia(odds ratio=22,33), and proteinuria(odds ratio=2.79). In summary, these study results strongly suggest that in order to prevent the low birth weight, special care should be made when the mother is too young or too old, and when the mother has experienced deliveries of low birth weight and fetal deaths. Medical control for the maternal diseases such as anemia and hypertension is also needed before or during the pregnency.