{"title":"Prof. Marco Milani-Comparetti Firenze 15.5.1926 – Lucca 18.5.1999","authors":"L. Gedda","doi":"10.1017/S0001566000000192","DOIUrl":"https://doi.org/10.1017/S0001566000000192","url":null,"abstract":"","PeriodicalId":7118,"journal":{"name":"Acta geneticae medicae et gemellologiae","volume":"29 1","pages":"261-261"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91416270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"From the research on electrophoretical mobility of nuclei in twins.","authors":"E Rebacz","doi":"10.1017/s0001566000000131","DOIUrl":"https://doi.org/10.1017/s0001566000000131","url":null,"abstract":"<p><p>I studied 8 pairs of male twins and 14 pairs of female twins. The aim of this paper is to demonstrate the evaluation of development age in pairs of twins examined through the electrophoretical mobility of nuclei. EMN index in pairs of male twins, the index figures do not change dramatically between the ages of 8-12. EMN index in pairs of female twins rises from 9-year-old to 11-year-old pair. In this paper I want to indicate the studies on development age, which began at The Twins Festival in Szczecin in 1998.</p>","PeriodicalId":7118,"journal":{"name":"Acta geneticae medicae et gemellologiae","volume":"47 3-4","pages":"215-7"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/s0001566000000131","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21756312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A comparative study of twinning and triplet rates in 17 countries, 1972-1996.","authors":"Y Imaizumi","doi":"10.1017/s0001566000000271","DOIUrl":"https://doi.org/10.1017/s0001566000000271","url":null,"abstract":"<p><p>Secular changes in twinning and triplet rates were analyzed using vital statistics in Austria, the Czech Republic, the Slovak Republic, England and Wales, Germany, the Netherlands, Switzerland, Denmark, Finland, Norway, Sweden, Canada, Australia, Hong Kong, Israel, Japan, and Singapore during the period from 1972 to 1996. Among those 17 countries, the twinning and triplet rates in the Czech Republic and in the Slovak Republic remained constant from 1972 to 1994, whereas these rates increased significantly year by year in the other 15 countries during the examined period in each country. Twinning rates increased from 1.2-fold in Austria to 2-fold in Denmark from 1972 to 1996. As for triplets, the rate increased from 3-fold in Denmark to 9-fold in Norway during that period. With one exception, that being the Slovak Republic, the triplet rate was highest in the Scandinavian countries, followed by the other European and Asian countries. The rising twinning and triplet rates have been attributed to the higher proportion of mothers treated with ovulation-inducing hormones and partially attributed to IVF.</p>","PeriodicalId":7118,"journal":{"name":"Acta geneticae medicae et gemellologiae","volume":"47 2","pages":"101-14"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/s0001566000000271","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21633188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"BREVE STORIA DEL METODO GEMELLARE 2: LE ATTUALI FORMULAZIONI DEL METODO","authors":"F. Lorenzi","doi":"10.1017/S0001566000000386","DOIUrl":"https://doi.org/10.1017/S0001566000000386","url":null,"abstract":"Il termine LISREL e l'acronimo di LI near Structural REL ationship ed e nato inizialmente come nome di un software messo a punto dallo svedese Karl Joreskog e dai suoi collaboratori nei primi anni '70 per stimare, col metodo della massima verosimiglianza, i coefficienti strutturali dei modelli basati su sistemi di equazioni strutturali. Tali modelli, nella elaborazione tramite il LISREL, rappresentano la sistemazione logica, prima ancora che statistica o computeristica, di tecniche di analisi multivariata le cui prime proposte risalgono all'ininzio del secolo; riconducendo ad un unico modello che ne costituisce una geniale sintesi, approcci ed itinerari scientifici fino ad allora distinti e non comunicanti, quali l'analisi fattoriale, i modelli causali e i modelli di misurazione. In particolare rappresentano in questo momento la piu completa e sistematica risposta al problema di operazionalizzare in termini di ricerca e di verifica empirica, nel campo delle scienze sociali, la controversa, ma non per questo meno fondamentale, nozione di causalita. Essi sono quindi la reinterpretazione, sistemazione e soprattutto generalizzazione di quelli che negli anni '60 venivano chiamati i modelli causali e che nella prima meta degli anni '70 avevano conosciuto una notevole popolarita fra i sociologi soprattutto attraverso la tecnica della path analysis.","PeriodicalId":7118,"journal":{"name":"Acta geneticae medicae et gemellologiae","volume":"33 1","pages":"57-71"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88008245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Analysis of triple test results in 27 cases of twin pregnancies.","authors":"M Perenc, L Dudarewicz, B Kałuzewski","doi":"10.1017/s0001566000000179","DOIUrl":"https://doi.org/10.1017/s0001566000000179","url":null,"abstract":"<p><p>The study comprises 889 pregnant women between 14 and 21 weeks of gestation. The control group consisted of 862 pregnant women with unburdened obstetric anamnesis with an uneventful singleton pregnancy. The examined group consisted of 27 pregnant women with uncomplicated twin pregnancy. In the sera of pregnant women AFP (Microparticle Enzyme Immunoassay AxSYM Abbott), total beta-hCG (Microparticle Enzyme Immunoassay AxSYM Abbott) and unconjugated estriol (Radioimmunoassay Amerlex-M. 2T Johnson & Johnson Ortho Clinical Diagnostics Ltd.) were determined. The risk of fetal trisomy 21 was calculated with the use of PRISCA 3.0 software, which corrected the MoM values for twin pregnancy. Ulm Index was also calculated. In the majority of twin pregnancies increased concentrations of AFP, total beta-hCG and uE3 in the range over 1.0 MoM was noted. In the group of women below 35 years of age with singleton pregnancies using PRISCA 3.0 software it approximated to 95%. For women older than 35 optimum index for fetal trisomy 21 risk calculation was Ulm Index with the specificity 93.8%. The specificity of AFP determination in the detection of fetal open NTD in singleton pregnancy was 99%. In the group of women with twin pregnancy the obtained specificity of 77.8% for PRISCA 3.0 software is low, a more advantageous way to calculate the risk of fetal trisomy 21 is Ulm Index with the specificity of 85.2%. The specificity of AFP determination as a screening for fetal open NTD in twin pregnancy was 96.3%.</p>","PeriodicalId":7118,"journal":{"name":"Acta geneticae medicae et gemellologiae","volume":"47 3-4","pages":"249-54"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/s0001566000000179","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21756316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Neurodevelopmental dysfunction and specific learning disabilities in school-aged twins.","authors":"B Garanty-Bogacka, W Wieczorek, M Syrenicz","doi":"10.1017/s000156600000012x","DOIUrl":"https://doi.org/10.1017/s000156600000012x","url":null,"abstract":"<p><p>The frequency of the developmental dysfunction and specific learning disabilities were assessed in the retrospective study in the group of 56 school-aged twins. The relationships between genetic, perinatal and social factors and learning disability were also determined. It was found that 12.5% of twins had learning disabilities. The most common neurodevelopmental dysfunction were language disorders, poor graphomotor fluency and poor fine motor dexterity. It was also found that educational difficulty were associated with prematurity, low Apgar scores, neonatal complications and familial predisposition.</p>","PeriodicalId":7118,"journal":{"name":"Acta geneticae medicae et gemellologiae","volume":"47 3-4","pages":"205-13"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/s000156600000012x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21757191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C Charlemaine, M Duyme, F Guis, B Camous, Y Brossard, A Aurengo, R Frydman, J C Pons
{"title":"Twin differences and similarities of birthweight and term in the French Romulus population.","authors":"C Charlemaine, M Duyme, F Guis, B Camous, Y Brossard, A Aurengo, R Frydman, J C Pons","doi":"10.1017/s0001566000000325","DOIUrl":"https://doi.org/10.1017/s0001566000000325","url":null,"abstract":"<p><p>This study was performed to examine the main characteristics of the French Romulus twin population: zygosity, chorionicity, sex, term and birthweight. A sample of 104 pairs of twins was distinguished by zygosity, chorionicity and sex, and divided into concordant and discordant birthweight groups. Fifty-three % (n = 55) of the fetus pairs studied were born at \"ideal term\" (35-38 weeks), and 25% (n = 26) were delivered at \"preterm\" (28-34 weeks). The very preterm (< 28 weeks), and \"postterm\" (> 38 weeks) represented altogether 22% (n = 23) of the sample. Of the 104 twin pairs, 68% (n = 71) differ by less than 15% in birthweight, and 32% (n = 33) have a birthweight difference higher than 15%. In dizygotic (DZ) pairs females had more tendency to be in the discordant group (p = 0.01) while in monochorionic-monozygotic (MC-MZ) pairs males were more discordant (p = 0.07). We found a significant interaction between sex and zygosity type (p = 0.02). Males had a birthweight difference significantly weaker than that of females in dichorionic-monozygotic (DC-MZ) and DZ twins whereas it was higher than that of females in MC-MZ twins. There were no MZ twin pairs with DC placentation over than 15% birthweight difference. Log linear analysis demonstrated a three-way interaction (p < 0.05) between term type, zygosity type and hypotrophy. Our data indicate that in the group of twins born between 35 and 38 weeks' gestation the crucial question still remains unsettled on how term and birthweight are related to zygotism and/or chorionicity.</p>","PeriodicalId":7118,"journal":{"name":"Acta geneticae medicae et gemellologiae","volume":"47 1","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/s0001566000000325","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21203946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G Andreano, M Dobosz, I Boschi, L E Ruscitti, A Liberti, D Casa
{"title":"[Three sets of twins in three successive generations through the maternal line].","authors":"G Andreano, M Dobosz, I Boschi, L E Ruscitti, A Liberti, D Casa","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>It is generally held that there are genetic factors for dizygotic (DZ) twinning, but the pattern of inheritance is far from clear. We report on a rare pedigree with three sets of spontaneous DZ female twin births in three successive generations. To our knowledge no similar pedigrees have been reported in literature. Zygosity determination in three pairs of twins was performed with ABO, MN and Rh blood groups from erythrocytes and with STR analysis from samples of saliva. In our pedigree, the direct transmission of the DZ twinning through the maternal line seems show an autosomal dominant pattern of inheritance. We believe that the inheritance of DZ twinning appears to be recessive in most case and autosomal dominant only in rare instances. It is plausible with the hypothesis that the expression of the dizygotic twinning trait in a mother shows a genetic heterogeneity.</p>","PeriodicalId":7118,"journal":{"name":"Acta geneticae medicae et gemellologiae","volume":"47 1","pages":"43-9"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21203953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Interpersonal conflicts in the relationship of twins.","authors":"S A Gruszewska","doi":"10.1017/s0001566000000040","DOIUrl":"https://doi.org/10.1017/s0001566000000040","url":null,"abstract":"<p><p>Taking into consideration two facts: that the structure of social life forces twins to part and that the presented roles in a pair are not equal, (one of the twins plays the role of a leader (L) and the other, the subordinate (P.)), one can ask the question--what meaning does the moment of parting have and what are its consequences? In order to do that, a survey was conducted, (a sample of 31 pairs of twins above the age of 30), in which every pair was asked the question: \"Which one of you made the decision about parting?\" The answer had two options: A--I, B--brother/sister. Out of 31 pairs of twins, 16 pairs chose the variant different from his brother or sister--that is A, B, admitting that the interpersonal conflict was the result of the parting. In 7 pairs, both twins chose the B variant--they withdrew from the conflict; and in 8 pairs they chose the A variant--looking for a compromise as the means of agreement. When analyzing the results of the survey, we can state the following: in the relationship of twins, there is an interpersonal conflict; the decision about parting is difficult with prevalent feelings of sadness and sorrow; after parting, at least one of the twins has problems with preserving his identity and integrity of psychological space. Since the moment of parting is necessary and difficult, specialists and mainly parents are required to consciously change their position towards the relationship of twins. It has to be the result of applied educational methods which aim at creating subjectivity and equality of each of the twins before the moment of parting.</p>","PeriodicalId":7118,"journal":{"name":"Acta geneticae medicae et gemellologiae","volume":"47 3-4","pages":"153-60"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/s0001566000000040","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21756448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}