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A fall in the rate of multiple births in Ibadan and Igbo Ora, Nigeria.

The twinning, triplet and quadruplet rates were found to be 23.8, 0.3 and 0.04 per thousand maternities, respectively in a survey of 71,773 maternities carried out in Ibadan and Igbo Ora, Nigeria. This represents a dramatic fall from the rates found in previous studies. The findings are discussed in the light of changing dietary habits.

Diet↗

Multiple birth defects in a newborn exposed to Mycoplasma pneumoniae in utero.

A newborn baby girl with progressive hydrocephalus and congenital defects of the skin and eyes was born to a mother who experienced bilateral bronchopneumonia in her first trimester. At the time of her infection, the mother's serum cold agglutinin titer was 1:128 and at delivery the mother's and baby's serum samples had complement-fixation titers to Mycoplasma pneumoniae of 1:1,024 and 1:256, respectively. At 1 week of age the baby's serum IgM value was 44 mg/100 ml (98% of cord IgM values in normal newborns range from 0 to 20 mg/100 ml). The baby died of progressive hydrocephalus, which may have had an inflammatory basis in view of the cerebrospinal fluid (CSF) protein level of 192 mg/100 ml. We realize that the significance of this association is questionable, but we believe that it is worthwhile to call the coincidence of events to the attention of others.

Abnormalities, Multiple↗

Twins and their health cost: consequences of multiple births on parental health and mortality in Denmark and England and Wales.

The rapid increase in twinning rates in developed countries has increased interest in the question as to whether twin mothers have higher mortality and more health problems than mothers of singletons. Here we use a national survey, the Office for National Statistics Longitudinal Study of England & Wales, and a linkage between the Danish Twin Registry and the Danish population register to examine mortality patterns after age 45 (50 for fathers) for twin parents and the whole population born from 1911 to 1950. For England and Wales, presence of limiting long-term illnesses and self-rated health status was also investigated. Overall similar health and mortality was found for twin parents and the whole population although both life table methods and survival analysis suggested a slight excess mortality among older cohorts of twin mothers in England and Wales.

Adolescent↗

Blood group chimerism in human multiple births is not rare.

Twin blood group chimerism seems to be very rare in humans. The 30-40 previously reported cases usually were found by mere coincidence during routine blood grouping in hospitals or blood banks. Usually in these cases frank blood group mixtures of, for example, 50/50%, 25/75%, or 5/95% at most were seen. Smaller percentages are very difficult to notice during routine work-up. Using a sensitive fluorescence technique (sensitivity > 0.01%) we detected blood group chimerism in 32/415 (8%) twin pairs and 12/57 (21%) triplet pairs, respectively, which is a higher incidence than reported previously.

Adolescent↗

Multiple birth risk factors and the distribution of handedness.

In this study, we attempted to maximize the likelihood of replicating Bakan's (1971, 1977a) observations that left-handedness was more probable in college students who were the progeny of "high-risk" births. To do this, the relationships between handedness and a combination of factors known to be associated with birth risk were computed. The observed relationships proved to be trivial and thus the validity of Bakan's hypothesis was questionned.

Adult↗