Time trends in the natural dizygotic twinning rate
| Autor: | Jean-Pierre Frijns, Marij Gielen, Catherine Derom, Maurice P. Zeegers, Hilde Peeters |
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| Přispěvatelé: | Complexe Genetica, Klinische Genetica, RS: NUTRIM - R4 - Gene-environment interaction, Family Medicine |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
EUROPE
media_common.quotation_subject Dizygotic twin fecundity Population Fertility Biology Birth rate SECULAR TRENDS Belgium NATIONAL BIRTH COHORT Twins Dizygotic Humans FERTILITY QUALITY Birth Rate education WIDE LINKAGE SCAN media_common education.field_of_study Incidence (epidemiology) dizygotic MOTHERS Rehabilitation Obstetrics and Gynecology twins Fecundity Secular variation time trend PREGNANCY Reproductive Medicine Female Pregnancy Multiple Crystal twinning Maternal Age Demography |
| Zdroj: | Human Reproduction, 26(8), 2247-2252. Oxford University Press |
| ISSN: | 1460-2350 0268-1161 |
| Popis: | BACKGROUND The natural dizygotic (DZ) twinning rate has been proposed as a reliable and useful measure of human fecundity, if adjusted for maternal age at twin birth. The aim of this study was to analyze age-adjusted trends in natural DZ twinning rates over the past 40 years using data from the 'East Flanders Prospective Twin Survey (EFPTS)'. METHODS This study involved 4835 naturally conceived twin pregnancies between 1969 and 2009 from the population-based Belgian 'EFPTS'. Age-adjusted trends in the incidence of natural DZ twin pregnancies were calculated using a generalized linear model with Poisson distribution. RESULTS Both the natural DZ twinning rates and maternal age at twin birth increased in a linear fashion from 1969 to 2009. When age-adjusted, we found that the trend in the natural DZ twinning rate was stable during the whole time period. CONCLUSIONS According to our population-based data and after age-adjustment, a stable natural DZ twinning rate could be observed over the last four decades. Under the assumption that the spontaneous DZ twinning rate is a sensor of fecundity, this indicates a stable 'high' fecundity for this population. |
| Databáze: | OpenAIRE |
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