• Women's Health Nursing
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• v.27 no.1
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• pp.27-39
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• 2021

Purpose: This study aimed to review recent findings from birth cohort studies on maternal and child environmental health. Methods: Birth cohort studies regarding environmental health outcomes for mothers and their children were investigated through a systematic review. A literature search was conducted in PubMed, CINAHL, the Cochrane Library, Embase, and RISS to identify published studies using the keywords using a combination of the following keywords: maternal exposure, environmental exposure, health, cohort, and birth cohort. Articles were searched and a quality appraisal using the Newcastle-Ottawa Scale for cohort studies was done. Results: A review of the 14 selected studies revealed that prenatal and early life exposure to environmental pollutants had negative impacts on physical, cognitive, and behavioral development among mothers and children up to 12 years later. Environmental pollutants included endocrine disruptors, air pollution (e.g., particulate matter), and heavy metals. Conclusion: This systematic review demonstrated that exposure to environmental pollutants negatively influences maternal and children's environmental health outcomes from pregnancy to the early years of life. Therefore, maternal health care professionals should take steps to reduce mothers' and children's exposure to environmental pollutants.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.10
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• pp.181-186
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• 2020

This study examined the artificial fertilization efficiency of crossbred goats from a farmhouse using frozen semen. Electrostimulation was used to ejaculate and collect semen to assess the artificial fertilization efficiency of crossbred goats. The sperm concentration, vitality, and vitality after melting were investigated. The sperm volume was within 2.5~3 ml, and the concentration was 21~25 × 10⁸/ml for each male crossbred goat. The melted semen had high vitality (≥90%). An IDEXX Rapid Visual Pregnancy Test kit was used for an earlier diagnosis of the pregnancy and to determine the pregnancy rate of fertilization using frozen-thawed semen. The reproductive performance of the artificially fertilized crossbred goats had the highest delivery rate (68%) from Farm C and the lowest delivery rate (45%) from farm A. The delivery rate through artificial fertilization was equal to the fertilization rate according to early pregnancy diagnostic kits. The artificial insemination efficiency was 45~68%. These findings can be used as the basis for improvement and breeding goats in goat farms and livestock research institutes.

• Journal of Life Science
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• v.20 no.6
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• pp.894-901
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• 2010

The purpose of this study was to examine obstetrical & gynecological health status and body composition for married female immigrants. The participants were 154 immigrant women living in Busan. Data were collected from July 2008 to July 2009 using a questionnaire and a bioelectrical impedance analysis tool (Inbody 720) for analysis of body composition. Most subjects were in the normal range for body composition, but some of those who answered the questionnaire had experienced some gynecological problems such as dysmenorrhea, or irregular menstruation. There was a significant difference in experiences with in vitro fertilization, pregnancy and abortion according to age and in premensturaion syndrome, as well as differences in regulation of menstruation during the past year, leukorrhea odor, experiences in in vitro fertilization, and delivery and breastfeeding according to nationality. There were significant differences in body mass index and waist-hip ratio according to age, as well as differences in percent body fat, body mass index and waist-hip ratio according to nationality. There were also significant differences in body mass index and waist-hip ratio according to period of stay in Korea. Procreative care protocols concerning married female immigrants' characteristics should be developed.

• Journal of Nutrition and Health
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• v.34 no.6
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• pp.656-663
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• 2001

This study was carried out to evaluate the minerals and trace elements contents in colostrum milk produced from 30 normal healthy mothers delivery at term, 10 mothers delivery preterm and 8 pregnancy induced hypertensive mothers(PIH) and to investigate the relationship between maternal minerals intakes during pregnancy and milk contents of minerals. Five minerals(Na, K, Ca, P, Mg) and three trace elements(Fe, Zn, Cu) in colostrum were determined by ICP-AES and maternal dietary intakes during pregnancy were estimated by semiquantitative frequency questionnaire. Maternal dietary intakes of three groups during pregnancy were below the recommended allowances except protein and phosphorus. The overall mean nutrients intakes of mothers delivered preterm were the lowest among three study groups, especially phosphorus and sodium intakes of preterm mothers were significantly lower than those of normal term mothers(p < 0.05). Dietary intakes of mothers with pregnancy induced hypertension were similar to those of normal term mothers except calcium intake of pregnancy induced hypefensive mother was the lowest among three groups. While potassium and phosphorus concentrations in preterm colosalm were significantly lower than those of term milk(p < 0.05), iron contents of colostrum in preterm and PIH groups were significantly higher than term milk respectively(p < 0.07). The other minerals concentrations of colostrum produced by the preterm mothers tended to be lower than term milk. There were not significant relationships between maternal dietary intakes of minerals during pregnancy and the corresponding mineral levels of colostrum of three groups of mothers except that Pearson correlation coefficient showed positive significant relationships between the calcium intakes of PIH mothers and the colostrum milk calcium levels. These results suggest that preterm milk might be insufficient for the mineral nutrition of preterm infects in considering of the poor tissue storage of minerals and catch-up growth of preterm infects.

• Journal of Preventive Medicine and Public Health
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• v.22 no.1 s.25
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• pp.146-152
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• 1989

To test the validity of referral of high risk pregnancy in the MCH Center, 6,017 pregnant women who visited MCH Center of South District Health Center for delivery between 1 April 1985 and 31 March 1987 were interviewed on arrival to obtain the data for demographic characteristics and obsteric history and traced to check the delivery outcome. Out of 5,820 women whose delivery outcomes were confrmed, 704 women(12.1%) were referred to other hospital or clinic for high risk factors. The proportion of poor delivery outcome(stillbirth, low birth weight and neonatal death) among referred cases was 4.4% while that of the women delivered at the MCH Center was 2.2% (p<0.01). Decision of the midwives for the referral of high risk pregnancy based on their clinical assessment was consistent with the delivery outcome (good or poor) in 86.5%. Major reasons for referral were premature rupture of membrane(46.5%) and cephalopelvic disproportion(20.0%) and the C-section rates for these cases were 10.1%, 17.6%, respectively. Discriminant analysis of the demographic characteristics and obstertric history for the discrimination of delivery outcome showed that gestational age had the highest discriminant function coefficient(0.88) and it was followed by parity(0.37) and maternal education(0.30). Referral of high risk pregnancy by the midwives based on their clinical assessment was considered to be reasonably valid. However, a risk scoring system for an MCH Center which can improve the validity may be developed if one applies the discriminant analysis for more comprehensive independent variable(including clinical assessment of midwife, demographic characteristics and obstetric history) and dependent variable (including medically indicated C-section, complication of pregnancy and delivery, stillbirth, low birth weight, neonatal death and maternal death).

• Korea journal of population studies
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• v.10 no.2
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• pp.17-45
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• 1987

This study contributes to understanding women's labor market behavior by focusing on a particular set of labor force transitions - labor force withdrawal and entry during the period surrounding the first birth of a child. In particular, this study provides a dynamic analyses, using longitudinal data and event history analysis, to conceptualize labor force behaviors in a straightforward way. The main research question addresses which factors increase or decrease the hazard rates of leaving and entering the labor market. This study used piecewise Gompertz model, following the guide of the non-parametric analysis on the hazard rates, which allowed relatively detailed description on the distribution of timing of leave and entry to the labor market as parameters of interest. The results show that preferences and structural variables, as well as economic considerations, are very important factors to explain the labor market behavior of women in the period surrounding childbirth.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.4 no.1
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• pp.46-53
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• 1993

To find some involvement of environmental factors in autism, season of birth, birth order, and maternal age at birth of autistic children were investigated Total number of clinical outpatient autistic children was 357, which consisted of 319 male and 38 female, then male-to-female sex ratio was 8.4 to 1, and all subjects were born during $1986{\sim}1988.$ These data were compared with those of controlled general populations. The results were as follows : 1) In monthly and seasonal distributions of birth, autistic children were not different from normal control 2) Comparing with control group by Slater's and Greenwood-Yule's birth order calculation methods, there was no significant difference in birth order of autistic children 3) The maternal ages at birth in autistic group were significantly higher than those of control group(P<01) 4) High-risk pregnancies were significantly frequent in autistic group compared with control group(p<01)Our study supported the idea that at least some environmental factors, especially at-risk pregnancy, are involved in autism causation.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.28 no.3
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• pp.338-346
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• 1995

Studies on activities of hepatocytes and changes of protein and total RNA contents in liver and muscle tissues associated with the gonadal maturation were performed using the adult rockfish, Sebastes schlegeli collected monthly from the adjacent waters at Poryong, Chungnam, Korea. Hepatosomatic index (HSI) of female increased from September and reached the maximum value (2.58) in February (growing stage of ovary). HSI of male began to increase from October (early maturation stage) and revealed the maximum value (3.20) in April (recovery stage). During the period of yolk formation in oocyte, the amount of glycogen particles and lipids in the hepatocytes of female gradually decreased, but total RNA contents increased. In the hepatocytes of male, a number of lipid droplets remained until the mature stage of testis. With the gonadal development of both sexes, granular endoplasmic reticula (Er) became abundant in the hepatocyte. These Ers might be supposed to have the leading role for the syntheses of protein and vitellogenin in the cytoplasm of the hepatocytes. Protein and total RNA contents in the liver and muscle tissues of female began to increase from January (growing stage) and reached the maximum value in early April (maturation stage), and then decreased in late April (gestation stage). In male, their contents began to increase from October (early maturation stage), thereafter reached the maximum value in December (maturation and copulation stage), and decreased in January (degeneration stage).

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.1
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• pp.375-382
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• 2010

The purpose of this study was to evaluate suppression of Streptococcus mutans(S. mutans) colonization by long-term xylitol consumption among pregnant women who can easily get bad oral hygiene status during pregnancy and breast feeding. Participants were voluntarily recruited for a pregnant women's oral health prevention program, classified into two groups(a control and a xylitol group), and then followed for 18 months. Stimulated whole saliva was collected in the afternoon(1:00-3:00 p.m.) at baseline, 6 months, 12months, and 18 months. Information regarding oral health behavior(tooth brushing frequency and regular dental visits) was obtained via a questionnaire. S. mutans counts of the xylitol group decreased considerably between baseline and the re-examinations at 6, 12, and 18 months. Although the S. mutans counts decreased for all time points compared to baseline in the control group, these differences did not reach significance except 18 months. Regular chewing of xylitol gum over a long period may lead to decrease the colony counts of S. mutans.

• Journal of Korean Home Economics Education Association
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• v.31 no.3
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• pp.73-90
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• 2019

The purpose of this study was to explore the differences in perceptions of male and female students about population problems and to draw up implications for population education. Using text mining, the report about population problem, which had written by students in population education class, were analysed. After extracting key words, semantic networks were visualized. The results were as follows. First, the high frequency words were the same for each gender. Second, key words based on frequency did not differ depending on gender. And the key words extracted by the correlation analysis and bigram were different. That is, in the semantic network of girls' words, the network of "life"-"marriage"-"birth"-"pregnancy" appeared independently, distinguishing it from male students who showed separate objective links to population problems. Therefore, it drew suggestions that male and female students should be viewed as heterogeneous groups with different cognitive structures on population problems and that the content and methods of population education should be approached differently depending on gender.