Mortality from birth to adult life: a longitudinal study of twins

Baird, Janis; Osmond, Clive; Bowes, Ian; Phillips, David I. W.

doi:10.1016/s0378-3782(98)00044-9

Cited by 12 publications

(8 citation statements)

References 13 publications

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“…Parity progression in mothers of twins S. L. Robson and K. R. Smith 2513 our divergent findings. First, it is well established that twins suffer higher infant mortality rates than singletons [3]. In our article, we accounted for the possibility that mothers of twins may have higher lifetime fertility rates as a result of child replacement by controlling for child mortality before the age of 18 years old.…”

Section: Parity Progression Ratios Confirm Higher Lifetime Fertility mentioning

confidence: 99%

Parity progression ratios confirm higher lifetime fertility in women who bear twins

Robson

Smith

2012

Proc. R. Soc. B.

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Section: Parity Progression Ratios Confirm Higher Lifetime Fertility mentioning

confidence: 99%

Parity progression ratios confirm higher lifetime fertility in women who bear twins

Robson

Smith

2012

Proc. R. Soc. B.

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“…This is because in addition to perinatal morbidity-mortality risks being greater for multiple births than for singletons, [25][26][27][28] emphasis needs to be placed on the fact that mortality among twins remains significantly higher than among singletons until the age of five years. 29 Thus, in another Brazilian sample, when twins were compared with singletons, the likelihood of stillbirths and early neonatal deaths among twins was 1.9 and 6.5 times greater, respectively. 28 Since, on average, twins are born three weeks earlier than singletons, 20 while 41.2% of the triplets are born before completing 33 weeks, 4 it is understandable that around 50% of twin births and more than 90% of triplets present low birth weight.…”

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Twinning rate in a sample from a Brazilian hospital with a high standard of reproductive care

Colletto

Beiguelman

2001

Sao Paulo Med. J.

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CONTEXT: Epidemiological studies on twin births have been motivated mostly by the positive correlation between twinning rate and human fertility, prematurity, low birth weight, increased risk of infant death and long term risk for morbidity. OBJECTIVE: This paper intends to estimate the incidence of multiple births in a private hospital in Brazil with a high standard of reproductive care, and to evaluate the effects of maternal age, gestation order and assisted fertilization on twinning rate. DESIGN: Retrospective analysis. SETTING: First-class tertiary private hospital, São Paulo, Brazil. PARTICIPANTS: The multiple birth rate was investigated among 7,997 deliveries from 1995 to 1998, including 7,786 singletons, 193 twins, 17 triplets and one quadruplet. RESULTS: The rates per 1,000 dizygotic and monozygotic pairs and for triplets were estimated as 19.51, 4.50 and 2.13, respectively. The dizygotic and triplet rates were the highest observed in Brazil up to the present day. The twinning rate among primigravidae older than 30 years was very high (45.02 per 1,000) and was due to a disproportionately high frequency of dizygotic pairs. The triplet rate was also very high among the mothers of this age group (5.71 per 1,000). These facts are strong indicators that these women were the ones most frequently submitted to assisted reproductive techniques. The mean maternal age of the studied population was about six years higher than that estimated for mothers in the general population of southeastern Brazil. Primigravidae aged under 30 years as well as multigravidae showed similar twinning rates, which were almost 20 per 1,000. Among the deliveries of multigravidae older than 30 years, an unusually high frequency of monozygotic twins was observed (7.04 per 1,000), probably as a consequence of the residual effect of long-term use of oral contraceptives. CONCLUSIONS: The dizygotic twinning rate increased from 13.51 to 28.98 per 1,000 over the four years studied, with the twinning rate for primigravidae over 30 years old in 1998 being twice that observed in 1995. The mean maternal age was also high during this period, but the extremely high increase in twinning rate observed cannot be attributed solely to this variable. Assisted fertilization seems to be the most probable cause of this unusually high twinning rate.

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“…Monozygotic and dizygotic twins are at higher risk of sudden infant death syndrome (Beal, 1989) due to problems that may have arisen in the perinatal period, such as congenital abnormalities and respiratory diseases (Baird et al, 1998), as well as clinical and social problems such as growth and development delays (Silva & Crosado, 1985).…”

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Multiple Birth Rates According to Different Socioeconomic Levels: An Analysis of Four Hospitals from the City of Sao Paulo, Brazil

et al. 2003

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Mortality from birth to adult life: a longitudinal study of twins

Cited by 12 publications

References 13 publications

Parity progression ratios confirm higher lifetime fertility in women who bear twins

Parity progression ratios confirm higher lifetime fertility in women who bear twins

Twinning rate in a sample from a Brazilian hospital with a high standard of reproductive care

Multiple Birth Rates According to Different Socioeconomic Levels: An Analysis of Four Hospitals from the City of Sao Paulo, Brazil

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