• 제목/요약/키워드: Birth intervals

검색결과 69건 처리시간 0.02초

저출산수준과 강한 남아선호관이 사회에 미치는 영향 -성.연령별 인구 구조의 변화를 중심으로- (The Effects of Fertility and Strong Son Preference on Korean Society - On the basis of the changes of age and sex structure -)

  • 김태헌
    • 한국인구학
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    • 제16권2호
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    • pp.1-23
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    • 1993
  • Korea fertility level has dropped since the 1960's and speed of decline has accelerated in the 1980's. In the resuls, the growth rate reached to less then 1 percent in 1990 and will be $\ulcorner$0 $\lrcorner$ percent growth in 2021. The total population will increase to 50, 586 thousand persons in 2021 then will decrease. With the rapid fertility decline the age structure of Korean population has changed : while the proportion of child population aged 0-14 is decreasing sharply, that of old-age population aged 65 and over is increasing. Because of the recent increase of sex ratio at birth, the sex structure among the young generation has been destorted; the sex ratio at age 0-4 was as high as high as 112.0 in 1990. The effects of these population phenomena on Korean society are the followings: 1) Old age dependency ratio is increasing rapidly and continuously and will be about 40.0 from the 2050's. 2) Because of the rapid decline of the number of births, the absolute number of the major labour force at age 25-34 will decrease after around 2000 and then from the 2010's become less than that in 1990. 3) Since the large fertility defferentials by womens's educational level have continued and the relation between the educational levels of mothers and children are very strong, level has dropped among higher educated women first when the average fertility level has declined in Korea, the average educational level of the children is may be expected to be relatively low and then the future productivity is will be also low, which causes the decline of 'quality of population. 4) When the high sex ratio at birth (over 110 since 1986) continues, number of brides will be short by over 20 percent from the 2010s, which will bring various kinds of social prblems. Therefore, the counter measures in concrete to relieve the heavy problems are recommended as follows: 1) The extention of the birth intervals, which helps to drop the population growth rate at the same level of number of children per women. 2) The positive supports for out-migrants, which helps to reduce the population size without any destortion of age-sex structure. 3) The defferent supports of family planning for the higher and lower classes, which helps to reduce the gaps between different ferility levels of the classes and to keep and improve the quality of population. 4)population education for both students and adults, which helps to minimize the gap between the private and public requirements.

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성장중(成長中)인 수퇘지에 있어서 혈청중(血淸中) LH, FSH, Prolactin, Testosterone, GOT 및 GPT의 농도변화(濃度變化) (Changes in Serum LH, FSH, Prolactin, Testosterone, GOT and GPT Concentrations in the Growing Male Pig)

  • 박창식;이규승
    • 농업과학연구
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    • 제11권1호
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    • pp.103-107
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    • 1984
  • 본(本) 연구(硏究)는 성장중(成長中)인 수퇘지에 있어서 혈청중(血淸中) LH, FSH, prolactin, testosterone, GOT 및 GPT의 농도(濃度)를 구명(究明)하기 위하여 출생시(出生時)부터 130kg까지 체중단계별(體重段階別)로 실시(實施)하였는 바, 공시돈(供時豚)으로는 6두(頭)의 삼원교잡종(三元交雜種) 수퇘지를 사용(使用)하였다. 그 얻어진 결과(結果)를 요약(要約)하면 다음과 같다. 1. 혈청(血淸) LH의 농도(濃度)는 출생시(出生時)부터 130kg까지 2.89~4.25mIU/ml의 범위(範圍)를 나타내었다. FSH의 농도(濃度)는 1.25mIU/ml이하(以下)로 분석한계수준(分析限界水準) 이하(以下)였다. 2. 혈청(血淸) prolactin의 농도(濃度)는 출생시(出生時) 8.05ng/ml로 제일 높은 수준(水準)을 나타내었으며, 15kg부터 50kg까지는 3.07~4.25ng/ml의 범위(範圍)로 급격히 감소(減少)하였다. 70kg부터는 7.30ng/ml로 다시 증가(增加)했다가 110kg부터 다시 감소(減少)하는 경향(傾向)이였다. 3. 혈청(血淸) testosterone의 농도(濃度)는 출생시(出生時) 0.42ng/ml, 15kg부터 30kg까지 0.11~0.09ng/ml, 그리고 15ng/ml 50kg부터 1.15ng/ml로 증가(增加)하여 거의 일정(一定)한 수준(水準)을 유지(維持)하였다. 4. 혈청(血淸) GOT의 농도(濃度)는 출생시(出生時) 130.75 karmen units/ml, 15kg부터 70kg까지 58.56~65.25karmen units/ml, 그리고 90kg부터 83.60 karmen units/ml로 점차 증가(增加)하였다. 5. 혈청(血淸) GOT의 농도(濃度)는 출생시(出生時) 63.25 karmen units/ml, 15kg부터 70kg까지 27.25~30.75 karmen units/ml, 그리고 90kg부터 41.62 karmen units/ml로 점차 증가(增加)하였다.

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Dose Dependence of the Severity of Radiation-Induced Thymic Lymphoma in Mice

  • GU, Yeunhwa;Oshima, Masami;Hasegawa, Takeo
    • 한국환경성돌연변이발암원학회지
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    • 제22권4호
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    • pp.266-273
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    • 2002
  • The dose dependence of the severity of radiation-induced thymic lymphoma in C57BL/6J mice was studied. Mice were exposed to fractionated irradiation at the total doses of 4.0, 6.0 and 8.0 Gy (four irradiations at 8-day intervals) starting from 33 days after birth. Pathological and histological changes of each mouse were observed after periodical sacrifice at day 75, 100, 125, 150, 175, 200, 250, 300 after the first irradiation. The severity of cancers were classified into 4 stages by clinical signs with respect to the enlargement of the thymus, spleen, liver, the progression of the cancer in the thymus, and the metastasis to the spleen, liver, lung and the lymphatic nodes. Among the 490 mice observed, 146 mice had thymic lymphoma. A clear dose-effect relationship was observed as well as the dose-response relationship. Also, periodical observation showed that thymic lymphoma was first induced in mice sacrificed at day 100 (130days old), and metastasize in the order of spleen, lung, liver and then the lymphatic nodes. The results suggest that radiation may be involved not only as a tumor initiator but also as a tumor promoter, and a tumor progression-enhancing agent.

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Traditional Unani perspective of perceived insufficient milk (Qillatul Laban) and Galactogogues: A literary research with recent studies

  • Sultana, Arshiya;Rahman, Khaleeq Ur
    • 셀메드
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    • 제4권3호
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    • pp.19.1-19.6
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    • 2014
  • The most important reason mentioned for the early discontinuation of breast feeding and introduction of supplementary bottles is Perceived Insufficient Milk (PIM), which is relatively common in women. This is of public health concern because the use of breast milk substitutes increases the risk of morbidity and mortality among infants in developing countries and shortens birth intervals. Thus, a literary search in classical text for aetiopathogenesis, symptoms and treatment of PIM were appraised to implement in contemporary era. The classical Unani texts viz., Al Qanon fit Tib (Canon of Medicine), Al Hawi (Continens Liber), Zakheera Kharzam Shahi, Tarjuma Kamilus Sana, Tibbe Akbar, Akseer Azam, and Kitabul Kulliyat were reviewed. Further certain galactogogue herbs which are in use since antiquity such as fenugreek, cotton seeds, cumin, asparagus, black cumin etc were explored in different search engines on website for proven galactogogue activity. The causes of PIM are abnormal temperament of body or breast, anaemia, anxiety, depression, malnutrition etc. The principle treatment is treating the cause viz., the temperament is corrected by diet and drugs in abnormal temperament, elimination of humour is required in dominance of humour etc. The aforementioned drugs are proven scientifically for their galactogogue activity. The classical texts are having valuable information regarding PIM, which can be implemented in present era. Aforementioned Unani drugs are proven scientifically for with their galactogogue effect, however, clinical trials are scarce. Therefore, further randomized controlled clinical trials are recommended.

Effects of an Infant Care Education Program for Mothers of Late-preterm Infants on Parenting Confidence, Breastfeeding Rates, and Infants' Growth and Readmission Rates

  • Jang, Eun Hye;Ju, Hyeon Ok
    • Child Health Nursing Research
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    • 제26권1호
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    • pp.11-22
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    • 2020
  • Purpose: The purpose of this study was to evaluate the effects of an education program for mothers of late-preterm infants on parenting confidence, breastfeeding rate, and infants' growth and readmission rate. Methods: The participants were 53 mothers of late-preterm infants (26 in the experimental group and 27 in the control group). The experimental group was administered the late-preterm care education program while the control group received standard care. The program consisted of two sessions during hospitalization after birth, one session at the time of discharge, and telephone and social networking service consultations at weekly intervals for the month following discharge. The collected data were analyzed using the t-test, x2 test, and repeated-measures analysis of variance. Results: Parenting confidence and the breastfeeding rate were significantly higher in the experimental group than in the control group. However, there was no significant difference in the late-preterm infants' growth and readmission rates between the experimental and control groups. Conclusion: A care education program for mothers of late-preterm infants can be a useful nursing intervention in clinical practice.

보수 및 보강요소를 이용한 RC 부재의 비탄성 해석 (Inelastic Analysis of RC Members Using Repair and Retrofitted Element)

  • 이도형
    • 지구물리
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    • 제9권4호
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    • pp.301-310
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    • 2006
  • 본 연구에서는 손상된 철근콘크리트 구조부재의 내진성능을 검토하기 위하여 탄소성 보수 및 보강요소를 개발하였다. 개발된 요소는 저하된 강도 및 강성의 상태를 유지한 부재상태에 보수 및 보강에 의한 특성치들의 증가분에 대한 효과를 반영할 수 있다. 이 요소는 활성시작시간과 활성끝시간을 갖는 요소로서 정적시간이력해석이나 동적시간이력해석의 경우, 사용자가 원하는 시간간격 내에서 자유롭게 활성화를 시킬 수 있다. 보수 및 보강된 철근콘크리트 부재에 대한 비교해석이 수행되었고, 개발된 요소를 이용한 해석결과는 실험결과와 비교하여 만족할만한 상관관계를 나타내었다. 즉, 본 연구에서 개발된 요소는 보수 및 보강된 철근콘크리트 부재의 내진수행능력 산정에 유용한 자료를 제공할 수 있을 것으로 사료된다.

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한국 Bayley 영유아 발달검사수행의 안정성: 종단 연구 (The Stability of K-BSID-II Performance: A Longitudinal Study)

  • 박혜원;신민선
    • 대한가정학회지
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    • 제44권2호
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    • pp.103-112
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    • 2006
  • This study followed the standardization study pool of K-BSID-II to examine the stability of K-BSID-II. One hundred and ninety five infants aged from 1-42 months tested twice with intervals of 5-16 month between tests. All participants had been full-term babies without any medical complications. There were no significant differences between the groups which were divided in terms of demographic variables such as mothers' education, infants' birth order and gender. The stability of K-BSID-II was significant and that of the mental scale was lower than that of the psycho-motor scale: There were high stabilities between raw scores in two sessions(r=.91 for the mental scale and r=.89 for the psycho-motor scale) but there were significant but low correlations between mental index scores(r=.18, p<.05) and psycho-motor index scores(r=.17, p<.05). The stability was increased with initial test age and mothers' education. It was recommended for testers and researchers to use both raw scores and index scores for better interpretations in future research.

Risk Factors for Stage IV Breast Cancer at the Time of Presentation in Turkey

  • Uyeturk, Ummugul;Tatli, Ali Murat;Gucuk, Sebahat;Oksuzoglu, Berna;Ulas, Arife;Avci, Nilufer;Ozbay, Mehmet Fatih;Gunduz, Seyda;Akinci, Muhammed Bulent;Salim, Derya Kivrak;Sonmez, Ozlem Uysal;Akdag, Fatma;Ergenc, Hasan
    • Asian Pacific Journal of Cancer Prevention
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    • 제14권12호
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    • pp.7445-7449
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    • 2013
  • Background: Breast cancer (BC) is the one of the most common cancers in women. It is also a leading cause of death. Unfortunately, some patients initially present with distant metastases and are diagnosed with stage IV disease that is nearly always, by then, incurable. This retrospective analysis investigated the risk factors for stage IV BC that may underlie such late presentation. Materials and Methods: In all, 916 patients with BC who visited the medical oncology polyclinic of eight different centres in Turkeybetween December 2011 and January 2013 were analysed. Results: A total of 115 patients (12.6%) presented with stage IV disease. In univariate analysis; to comparing these with patients at other stages, no statistical difference was found for median diagnosis age or age at menarche (p=0.611 and p=0.820), whereas age at menopause and age at first live birth were significant (p=0.018 and p=0.003). No difference was detected in terms of accompanying diseases, use of oral contraceptives and hormone replacement therapy, smoking, alcohol consumption and the rate of family history of BC between the patients (p=0.655, p=0.389, p=0.762, p=0.813, p=0.229, p=0.737). However, screening methods were employed less often, the rate of illiteracy was higher, and the rate of other cancers was higher in patients with stage IV BC (p=0.022, p=0.022, p=0.018). No statistical difference was observed between the patients in terms of tumour histopathology, and status of oestrogen receptor, progesterone receptor, or human epidermal growth factor-2 receptor (p=0.389, p=0.326, p=0.949, p=0.326). Grade 3 tumours were more frequent in patients with stage IV disease (p<0.001). On multivariate analysis, risk factors for stage IV breast cancer at the time of presentation were found to be age at first live birth and educational level (p=0.003 and p=0.047). Conclusions: Efforts should be made to perform mammography scans, in particular, at regular intervals through national training programs for all women, particularly those with family histories of breast and other types of cancer, and to establish early diagnosis of BC long before it proceeds to stage IV. Additionally, women's education had better be upgraded. In order to make women aware of BC, national education-programmes must be organised.

The Effect of Breastfeeding Duration and Parity on the Risk of Epithelial Ovarian Cancer: A Systematic Review and Meta-analysis

  • Sung, Ho Kyung;Ma, Seung Hyun;Choi, Ji-Yeob;Hwang, Yunji;Ahn, Choonghyun;Kim, Byoung-Gie;Kim, Yong-Man;Kim, Jae Weon;Kang, Sokbom;Kim, Jaehoon;Kim, Tae Jin;Yoo, Keun-Young;Kang, Daehee;Park, Suekyung
    • Journal of Preventive Medicine and Public Health
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    • 제49권6호
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    • pp.349-366
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    • 2016
  • Objectives: We conducted a systematic review and meta-analysis to summarize current evidence regarding the association of parity and duration of breastfeeding with the risk of epithelial ovarian cancer (EOC). Methods: A systematic search of relevant studies published by December 31, 2015 was performed in PubMed and EMBASE. A random-effect model was used to obtain the summary relative risks (RRs) and 95% confidence intervals (CIs). Results: Thirty-two studies had parity categories of 1, 2, and ${\geq}3$. The summary RRs for EOC were 0.72 (95% CI, 0.65 to 0.79), 0.57 (95% CI, 0.49 to 0.65), and 0.46 (95% CI, 0.41 to 0.52), respectively. Small to moderate heterogeneity was observed for one birth (p<0.01; Q = 59.46; $I^2=47.9%$). Fifteen studies had breastfeeding categories of <6 months, 6-12 months, and >13 months. The summary RRs were 0.79 (95% CI, 0.72 to 0.87), 0.72 (95% CI, 0.64 to 0.81), and 0.67 (95% CI, 0.56 to 0.79), respectively. Only small heterogeneity was observed for <6 months of breastfeeding (p = 0.17; Q = 18.79, $I^2=25.5%$). Compared to nulliparous women with no history of breastfeeding, the joint effects of two births and <6 months of breastfeeding resulted in a 0.5-fold reduced risk for EOC. Conclusions: The first birth and breastfeeding for <6 months were associated with significant reductions in EOC risk.

포유모돈(哺乳母豚)의 포유(哺乳), 휴식(休息) 및 수면행동(睡眠行動)에 관(關)한 연구(硏究) (Study on the Behaviour of Nursing, Rest and Sleep in the Lactating Sow)

  • 한성욱;박창식
    • 농업과학연구
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    • 제11권2호
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    • pp.218-222
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    • 1984
  • 본(本) 연구(硏究)는 1984년(年) 7월(月) 6일(日)부터 8월(月) 3일(日)까지 28일간(日間), 분만모돈(分娩母豚) 40두(頭)와 분만자돈(分娩仔豚) 420두(頭)를 가지고, 분만(分娩), 포유(哺乳), 수안행동(睡眼行動)을 조사하고자 실시(實施)하였던 바, 그 결과(結果)를 요약(要約)하면 다음과 같다. 1. 분만모돈(分娩母豚)은 분만시(分娩時) 좌(左) 우(右)로 누워서 분만(分娩)했으며, 분만(分娩)도중 50%는 분만자세(分娩姿勢)를 바꾸었다. 출생(出生) 자돈(仔豚)의 65.5%는 앞쪽으로 출산(出산)하였다. 포유자세(哺乳姿勢)는 좌측(左側)으로 눕는것이 51.3%였다. 2. 자돈분만시간(仔豚分娩時間)은 239.3분(分)이었고, 자돈(仔豚)과 자돈(仔豚)의 분만간격(分娩間隔)은 19.3분(分)이었다. 3. 분만후(分娩後) 첫 번째 젖을 빨려는 시도는 분만후(分娩後) 24.3분(分)이었으며, 젖꼭지 결정시기는 분만후(分娩後) 31.9시간(時間)이었다. 4. 분만일(分娩日) 자돈(仔豚)의 포유시간(哺乳時間)과 포유회수(哺乳回數)는 각각(各各) 35.8초(秒)와 24.6회(回)/1일(日)이었으며, 포유기간(哺乳期間)이 경과할수록 포유시간(哺乳時間)과 포유회수(哺乳回數)가 단축되었다. (P<.01, P<.05) 포유간격(哺乳間隔)은 분만일(分娩日)에 58.5분(分)이었으며, 포유기간(哺乳期間)이 경과할수록 포유간격(哺乳間隔)이 길어졌다. 5. 포유모돈(哺乳母豚)은 하루중 깨어있는 시간이 31.7%, 쉬는 시간이 51.6%이었다.

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