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Conjoined twinning in Sweden.

B Källén, G Rybo

    Acta Obstetricia Et Gynecologica Scandinavica
    |January 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

    A cluster of conjoined twins occurred in Skövde, Sweden in 1975-76. Investigations found no common cause for this rare congenital malformation.

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    Area of Science:

    • Medical Science
    • Epidemiology
    • Genetics

    Background:

    • A notable occurrence of conjoined twinning was observed at Skövde Central Hospital between 1975 and 1976.
    • This event prompted an investigation into the incidence and potential causes of conjoined twinning.

    Purpose of the Study:

    • To report and analyze a small epidemic of conjoined twinning in Skövde.
    • To determine the incidence of conjoined twinning in Sweden during the period.
    • To identify any common etiological factors among the affected mothers.

    Main Methods:

    • Case reporting and epidemiological analysis.
    • Review of national congenital malformation records.
    • Interviews with mothers of conjoined twins.

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    Main Results:

    • An "epidemic" of conjoined twinning was identified in Skövde during 1975-76, with an annual birth rate of 2300.
    • Over a ten-year period, 10 cases of conjoined twinning were reported nationwide, suggesting an incidence of approximately 1:75,000 births.
    • Interviews with the three mothers in Skövde revealed no shared risk factors or common etiological agents.

    Conclusions:

    • The Skövde conjoined twinning cluster did not reveal a specific environmental or genetic cause.
    • The overall incidence of conjoined twinning in Sweden during the study period was consistent with general population estimates.
    • Further research is needed to understand the multifactorial causes of conjoined twinning.