• Journal of Korean Academy of Nursing
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• v.28 no.3
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• pp.573-582
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• 1998

The purpose of this study was to investigate pregnancy, abortion and delivery rates among Korean teenagers. The subjects of this study were 11,433 teenagers aged 13-19 years in Seoul, Pusan, Taegu, Kwangju, Incheon, Taejeon and Ansan, Korea. Data were collected from Feb. 1994 to May 1995, 16 months, by schoolnurses or the researchers. The results showed pregnancy rate was 7.2 per 1,000 teenagers, the abortion rate was 4.3 per 1,000 teenagers, and the delivery rate was 1.2 per 1,000 teenagers. In the pregnancy experience, the main factors related to teenage pregnancy were love or marriage engagement. In the abortion experience, 53.9% of teenagers had had more than two abortion experiences, 38.1% midtrimester abortion, 22% complications after abortion, 36.0% sexual activity after abortion and 86.7% the financial support from partners or friends for abortion. In the delivery experience, 64.3% of teenagers delivered with no prenatal care and 42.9% had a delay in realizing they were pregnant. Fifty percent were delivered by non-professionals in non-medical institutions.

• Journal of Embryo Transfer
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• v.20 no.2
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• pp.89-95
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• 2005

In this study, we investigated the effects of number, grade, stage and day of embryos on pregnancy and abortion rates of Holstein heifer recipients after transfer of in-vitro produced Korean Native Cattle (Hanwoo) embryos. When one, two or three blastocysts were transferred to recipients, pregnancy (32.0, 44.0 and $32.0\%$) and abortion (12.5, 13.6 and $6.3\%$) rates did not differ among treatments. The pregnancy and abortion rates of different grades of blastocysts were $40.8\~44.2\%\;and\;9.4\~16.3\%$, respectively. However, they were not significantly different. According to the stage of blastocyst, the pregnancy rates were similar between $39.1\%\;and\;45.3\%$. However, the abortion rate in hatched blastocyst stage $(20.8\%)$ was significantly higher than that in late blastocyst stage $(9.0\%)$. The pregnancy rates in day $7\cdot7$ and day $7\cdot8$ blastocyst (47.1 and $53.9\%$, respectively) was significantly higher than that in the day $9\cdot9\;and\;8\cdot9$ blastocyst (29.8 and $27.7\%$, respectively). The abortion rate was the highest in the day $9\cdot9$ blastocyst $(30.8\%)$ among treatments, and it was significantly different compared to that in the day $7\cdot7$ blastocyst $(10.1\%)$. Therefore, this study suggested that the pregnancy rate was affected by only day of embryos, while the abortion rate was affected by stage and day of embryos.

• Korean Journal of Veterinary Research
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• v.38 no.4
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• pp.859-866
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• 1998

This study was carried out to investigate the prevalence of Neopsora (N) caninum infection in Korean dairy herds. To determine the prevalence of antibodies to N caninum in Korean dairy cattle, a total of 1,688 sera including 895 sera taken from 30 herds having recent high abortion rate and 793 sera selected randomly from 168 herds with no history of recent abortion problem, respectively, collected nationwide during a designated period were analyzed by indirect fluorescent antibody (IFA) test. Mean nationwide seropositive rate of the sera tested in herds and individual cattle tested were 53.5% and 35.6%, respectively. However mean seropositive rate of the samples from herds having abortion problem was approximately two and half times higher than those in herds with no recent abortion history. Regional seropositive rates of the samples from the herds with abortion problem were 48.6%, 51.6%, 44.4% and 71.4% at Kyunggi, Kangwon, Kyungbuk and Jeonnam province, respetively. Regional seropositive rates of the samples from the herds with no recent abortion problem were 35.6%, 18.3%, 16.5%, 37.5%, 19.4%, 33.3%, 32.1%, 3.8% and 0.0% at Kyunggi, Kangwon, Chungbuk, Chungnam, Kyungbuk, Kyungnam, Jeonbuk, Jeonnam and Jeju province, respectively. The results of this study suggested that N caninum infection was widespread and considerably associated with bovine abortion in Korea.

• Journal of Korean Academy of Nursing
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• v.3 no.2
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• pp.53-65
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• 1973

In order to explore the present status of induced abortion, a survey was conducted on 578 married women : 320 employed women, 165 urban and 93 rural housewives, during the period form June, 1972 to september, 1972. The results were as follows: 1. The rates of induced abortion in urban housewives, employed women and rural housewives were 50.3%, 30.3% and 1l.8%, respectively. 2. With regard to the duration of marital life, the rate of induced abortion was higher group of 11-16 and 17-22 years of duration than those of less than 4 years ana more than 23 years. 3. There were significant differences between housewives and the employed women. and also between urban and rural housewives in the rates of induced abortion. 4. The mean number of pregnancies was 4.9 and 4.8 for the rural and urban housewives while for the employed women was 2.1. 5. The mean number of live births was 4.5 and 3.2 for the rural and urban housewives while for the employed women was 2.1. 6. Average number of living children of the women who had experienced induced abortions was 4.8 and 3.1 for the rural and urban housewives while for the employed . women was 2.5. 7. There was a significant correlation between induced abortions and social class or educational level. The higher their level of education or social class, the more frequently women were experienced induced abortions. 8. There was a significant correlation between experience of induced abortions and family planning practice, vis., the women who had experienced induced abortions made more use of family planning practices.

• Journal of Embryo Transfer
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• v.20 no.1
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• pp.17-24
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• 2005

This study was conducted to investigate the effects of various factors of recipients such as recipient parity, body condition score(BCS), estrus type, corpus luteum, uterine size and uterine horn, on pregnancy and abortion after transfer of in vitro produced Korean Native Cow embryos. The pregnancy rate of nulliparous $(43.5\%)$was significantly higher than that of multiparous $(33.6\%)$, but there were no difference in the abortion rates $(122.6\;vs.\;7.5\%)$. There were no difference in pregnancy among the groups of BCS treatment, but the abortion rate was significantly higher in the group of below BCS $2.0\~3.0\;(55.6\%)$ than the group of BCS $3.0\~3.9\;(10.8\%)$. The pregnancy and abortion rates from the estrus type, corpus luteum, uterine size and uterine hem were not differ among treatment groups.

• The Journal of Korean Obstetrics and Gynecology
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• v.36 no.1
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• pp.1-22
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• 2023

Objectives: This study was performed to analyze randomized controlled trial, which studied the effect of herbal medicine treatment on Antiphospholipid antibody positive recurrent abortion. Methods: We searched for randomized controlled trial of last 20 years based on Antiphospholipid antibody positive recurrent abortion and herbal medicine. The paper search was conducted through 7 online databases on July 16, 2022. Results: 9 studies were selected after selection and exclusion criteria. 5 studies compared combined treatment of herbal and western medicine, with western medicine alone. 4 studies compared herbal medicine alone with western medicine. Comparing with control group, the treatment group showed much improvement on conversion rate of anti-phospholipid antibodies, serum hCG and progesterone levels, pregnancy duration or fertility rates, and various symptoms. Conclusions: In this study, we found out benefit of herbal medicine with Antiphospholipid antibody positive recurrent abortion. For reliable evidence, further research is needed to establish safety of herbal medicines, standardize symptom criteria and specify the treatment course.

• Clinical and Experimental Reproductive Medicine
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• v.51 no.1
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• pp.85-90
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• 2024

Objective: The purpose of this study was to compare fresh and frozen-thawed euploid blastocyst transfer protocols following preimplantation genetic screening (PGS) in cases of advanced maternal age. Methods: A total of 330 patients were examined retrospectively. PGS was performed on the embryos of 146 patients for whom fresh transfers were chosen. In contrast, frozen-thawed euploid single embryo transfer (ET) was selected after PGS for 184 patients, and their embryos were vitrified. The percentage of euploid embryos and rates of implantation, pregnancy, and pregnancy continuity, as well as clinical and biochemical abortion rates, were compared. Results: The numbers of retrieved oocytes, metaphase II oocytes, and fertilized ova were greater in the frozen-thawed group. The percentages of euploid embryos were comparable between the fresh and frozen-thawed groups (32% vs. 34.8%, respectively). The rates of implantation (46.6%vs. 62.5%), pregnancy (50% vs. 66.8%), ongoing pregnancy (38.4% vs. 53.8%), and live birth percentage (37.0% vs. 53.8%) were significantly higher in the frozen-thawed group. However, no significant differences were found in the clinical and biochemical abortion rates. Conclusion: The use of frozen-thawed single euploid ET is associated with increased implantation and pregnancy rates compared to fresh single euploid ET with PGS.

• Journal of Preventive Medicine and Public Health
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• v.4 no.1
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• pp.19-30
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• 1971

A survey was couducted by the staff of the Dept. of Preventive Medicine, Kyung Hee University, School of Medicine, from April through May 1971, on such events as delivery, death, abortion and family planning. The survey directed to a total population 6,552 (Male 3,133; Female 3,419) residing in this area (1,262 households) led us to the following findings: 1) Two year averages of crude birth rate, crude death rate and natural increase rates were 24.9, 5.0 and 19.9 respectively. 2) Infant death rates for the years 1969 and 1970 were 13.2 and 5.8 respectively, mean for the two year period being 9.3. 3) Hospital deliveries rated 68.5 per cent, Home deliveries 28.4 per cent and deliveries at midwives' offices 2.7 per cent. 4) Deliveries other than hospital and midwives' office deliveries were found to be attended more often by mothers. 5) About 41.4 per cent of all pregnant women during last two years received prenatal care once or more. 6) The induced abortion rate was 6.7 per cent in 1969 and 7.5 per cent in 1970. 7) The spontaneous abortion rate was 1.1 per cent in 1969 and 1.4 per cent in 1970. 8) Hypertension was the most frequent cause of adult death(21.6%). 9) The rate of current practice in family planning was 43.3 percent of all women.

• Clinical and Experimental Reproductive Medicine
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• v.48 no.3
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• pp.203-210
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• 2021

We performed a systematic review and meta-analysis to evaluate whether intralipid administration improved the outcomes of in vitro fertilization. Online databases (PubMed, Cochrane Library, Medline, and Embase) were searched until March 2020. Only randomized controlled trials (RCTs) that assessed the role of intralipid administration during in vitro fertilization were considered. We analyzed the rates of clinical pregnancy and live birth as primary outcomes. Secondary outcomes included the rates of chemical pregnancy, ongoing pregnancy, and missed abortion. We reviewed and assessed the eligibility of 180 studies. Five RCTs including 840 patients (3 RCTs: women with repeated implantation failure, 1 RCT: women with recurrent spontaneous abortion, 1 RCT: women who had experienced implantation failure more than once) met the selection criteria. When compared with the control group, intralipid administration significantly improved the clinical pregnancy rate (risk ratio [RR], 1.48; 95% confidence interval [CI], 1.23-1.79), ongoing pregnancy rate (RR, 1.82; 95% CI, 1.31-2.53), and live birth rate (RR, 1.85; 95% CI, 1.44-2.38). However, intralipid administration had no beneficial effect on the miscarriage rate (RR, 0.75; 95% CI, 0.48-1.17). A funnel plot analysis revealed no publication bias. Our findings suggest that intralipid administration may benefit women undergoing in vitro fertilization, especially those who have experienced repeated implantation failure or recurrent spontaneous abortion. However, larger, well-designed studies are needed to confirm these findings.

• Journal of Embryo Transfer
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• v.20 no.1
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• pp.9-15
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• 2005

This study was conducted to investigate the effects of various factors of practitioner's techniques such as skill, difficulty, consumed time, implantation depth, bleeding and altering of implant location, on pregnancy and abortion after transfer of in vitro produced Korean Native Cow embryos. The pregnancy rate of skilled transfer $(54.2\%)$ was significantly higher than that of unskilled transfer $(37.9\%)$, of 2/3 $(46.9\%)$ location in uterus was significantly higher than in 1/2 $(39.5\%)$ or 4/5 $(38.0\%)$ uterus, and of altering implantation location $(52.9\%)$ was significantly increased. There were no difference in pregnancy among the groups of difficulty of transfer, consumed time and bleeding of uterus. The abortion rates from skill, difficulty of transfer, implantation depth, consumed time, bleeding of uterus and altering of location were not differ.