Twin Pregnancies in Cardiff and Vale of Glamorgan Over Four Decades: Natural Twinning is on the Increase

Faisel, Hala; Majoko, Franz; Shebl, Fatma M.; Lindsay, Peter

doi:10.1097/01.ogx.0000338080.66518.0f

Cited by 4 publications

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“…However, Lambalk et al (2004) showed that the increase in opposite-sex twins in the period 1995−2002 was mainly caused by natural conception and not by ART. Along this line, Faisel et al (2008) analyzed the twinning rates in Cardiff and Vale of the Glamorgan area of South Wales during the period 1965 to 2004 and reported a continuous and gradual increase of twinning rate from 10.0 per 1000 spontaneous pregnancies in 1980−1984 to 13.3 per 1000 in 2000−2004 (p value <.0001). Another study, conducted in Norway in the same period, reported a constant increasing frequency of twins among natural conception, the rate being around 10 per 1000 births in 1967 and 15 per 1000 in 2001 (Tandberg et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Trends in Dizygotic and Monozygotic Spontaneous Twin Births During the Period 2007–2017 in Lombardy, Northern Italy: A Population-Based Study

et al. 2022

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In this study, we analyzed the estimated frequency of monozygotic (MZ) and dizygotic (DZ) spontaneous twins in Lombardy during the period 2007−2017. This is a population-based study using the regional healthcare utilization databases of the Lombardy Region. The total number of spontaneous twin deliveries, in separate strata of like and unlike sex, was obtained. Moreover, estimates of DZ and MZ twin births were calculated using Weinberg’s method. The standardized rates (SRs), adjusted for maternal age, of DZ and MZ twin births were computed according to calendar period. The twinning rates were calculated among strata of parity and maternal age. Finally, DZ:MZ ratio was calculated. Among the 734,278 spontaneous deliveries, 9176 (12.5 out of 1000 births) couples of twins were identified. In the three periods considered (i.e. 2007−2010, 2011−2014 and 2015−2017), no trend in the SRs of MZ twins was observed, respectively 0.41 (95% CI [0.40, 0.43]), 0.43 (95% CI [0.42, 0.45]) and 0.43 (95% CI[0.42, 0.45]). Differently, a slightly decreasing trend was observed in DZ twins SRs, respectively 0.87 (95% CI [0.84, 0.89]), 0.81 (95% CI [0.79, 0.83]), and 0.78 (95% CI [0.76, 0.80]). As concerns parity and maternal age, the rate of DZ twin births was consistently higher in nulliparae women aged 35 years or more. In our cohort, despite the increase of maternal age, a decline of spontaneous twin births emerged, especially due to the downward trend of DZ twins.

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Section: Discussionmentioning

confidence: 99%

Trends in Dizygotic and Monozygotic Spontaneous Twin Births During the Period 2007–2017 in Lombardy, Northern Italy: A Population-Based Study

et al. 2022

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“…Total natural twinning rates are therefore thought to reflect changes in natural DZ twinning rates. Faisel et al (2008) assessed trends in twinning for two decades (from 1980 until 2004) using the Cardiff Birth Survey, a populationbased registry in South Wales, UK. After age-adjustment and exclusion of the medically conceived twins, their data showed a gradual and continuous increase in natural twinning rates.…”

Section: Introductionmentioning

confidence: 99%

Time trends in the natural dizygotic twinning rate

et al. 2011

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“…Internistische Grunderkrankungen, wie arterielle Hypertonie oder Diabetes mellitus erhöhen die Frühgeburtenrate[ 4 ] . Andererseits treten bei älteren Schwangeren auch vermehrt Schwangerschaftskomplikationen auf: Das Risiko für Mehrlingsschwangerschaften, das einen unabhängigen Risikofaktor für Frühgeburtlichkeit darstellt, erhöht sich mit dem mütterlichen Alter[ 5 ] und auch das Risiko für eine Präeklampsie ist erhöht[ 6 ] . Zwillingsschwangerschaften haben ein Frühgeburtsrisiko von etwa 50 %, sodass ein Anstieg von Zwillingsschwan-Frühgeborene weisen in Abhängigkeit vom Schwangerschaftsalter bei der Entbindung unterschiedliche Ausprägungen von Frühund Spätmorbidität auf.…”

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Einfluss der iatrogenen Frühgeburt auf die frühkindliche Morbidität

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2011

Z Geburtshilfe Neonatol

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The incidence of premature births is not decreasing in developed countries, but rather shows a tendency to increase. This rise is primarily due to an increase in the number iatrogenic late preterm births at a gestational age between 34 + 0 and 36 + 6 weeks. Late preterm births account for up to 80% of all preterm births and these newborns have higher morbidity and mortality rates and a higher rate in neurodevelopmental long-term impairment in comparison to term infants. In order to reduce iatrogenic preterm birth, it is necessary to apply standardised treatment algorithms especially in cases of mild preeclampsia and intrauterine growth restriction.

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Twin Pregnancies in Cardiff and Vale of Glamorgan Over Four Decades: Natural Twinning is on the Increase

Cited by 4 publications

References 0 publications

Trends in Dizygotic and Monozygotic Spontaneous Twin Births During the Period 2007–2017 in Lombardy, Northern Italy: A Population-Based Study

Trends in Dizygotic and Monozygotic Spontaneous Twin Births During the Period 2007–2017 in Lombardy, Northern Italy: A Population-Based Study

Time trends in the natural dizygotic twinning rate

Einfluss der iatrogenen Frühgeburt auf die frühkindliche Morbidität

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