Hostname: page-component-cd9895bd7-gxg78 Total loading time: 0 Render date: 2024-12-26T18:20:45.347Z Has data issue: false hasContentIssue false
  • English
  • Français

Ethnic differneces in twinning rates in Nigeria

Published online by Cambridge University Press:  31 July 2008

P. P. S. Nylander
P. P. S. Nylander
Affiliation:
Department of Obstetrics, University of Ibadan, Nigeria
Get access Rights & Permissions [Opens in a new window]

Extract

A study was made of twinning rates in mothers of different ethnic origin delivered in two hospitals in Ibadan, Nigeria; the great majority were of Western Nigerian origin. The twinning rates in mothers of Western, Eastern, Mid-Western and Northern Nigerian origin were 45, 45, 31 and 21/1000 maternities, respectively. The monozygotic twinning rates determined by sex, placentation, blood groups and other genetically determined markers in the different ethnic groups varied very little, the differences in the overall twinning rates being mainly due to variation in the dizygotic rates. The effect of factors such as hospital selection and maternal age and parity on the observed incidence of twinning is discussed.

Type
Research Article
Information
Journal of Biosocial Science , Volume 3 , Issue 2 , April 1971 , pp. 151 - 158
Copyright
Copyright © Cambridge University Press 1971

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bulmer, M. G. (1959) The effect of parental age, parity and duration of marriage on the twinning rate. Ann. hum. Genet. 23, 454.CrossRefGoogle ScholarPubMed
Cox, M.L. (1964) Incidence and aetiology of multiple births in Nigeria. J. Obstet. Gynaec. Br. Commonw. 70, 878.CrossRefGoogle Scholar
Hopkinson, D.A. & Harris, H. (1965) Evidence for a second ‘structural’ locus determining human phosphoglucomutase. Nature, Lond. 208, 410.CrossRefGoogle ScholarPubMed
Hopkinson, D.A. & Harris, H. (1968) A third phosphoglucomutase locus in man. Ann. hum. Genet. 31, 359.CrossRefGoogle ScholarPubMed
Knox, G. & Morley, D. (1960) Twinning in Yoruba women. J. Obstet. Gynaec. Br. Commonw. 67, 981.CrossRefGoogle ScholarPubMed
Lewis, W.H.P. & Harris, H. (1967) Human red cell peptidases. Nature, Lond. 215, 351.CrossRefGoogle ScholarPubMed
Nylander, P.P.S. (1969a) The frequency of twinning in a rural community in Western Nigeria. Ann. hum. Genet. 33, 41.CrossRefGoogle Scholar
Nylander, P.P.S. (1969b) The value of the placenta in the determination of zygosity—A study of 1,052 Nigerian twin matemities. J. Obstet. Gynaec. Br. Commonw. 76, 699.CrossRefGoogle Scholar
Nylander, P.P.S. (1970) Twinning in Nigeria. Acta Genet. med. Gemell. 19, 457.CrossRefGoogle ScholarPubMed
Nylander, P.P.S. (1971) Twinning in a rural community in Western Nigeria. Its relation to maternal age and parity. Bull. int. epidem. Ass. (In press).Google Scholar
Nylander, P.P.S. & Corney, G. (1969) Placentation and zygosity of twins in Ibadan, Nigeria. Ann. hum. Genet. 33, 31.CrossRefGoogle ScholarPubMed
Parkes, A.S. (1969) Multiple births in man. J. Reprod. Fert. Suppl. 6, 105.Google Scholar
Registrar General (1967) Statistical Review of England and Wales for the year 1965. HM Stationery Office, London.Google Scholar
Shipley, P.W., Wray, J.A., Hechter, H.H., Arellano, M.G. & Borhani, N.O. (1967) Frequency of twinning in California: its relationship to maternal age, parity and race. Am. J. Epidemiol. 85, 147.CrossRefGoogle ScholarPubMed
Spencer, N., Hopkinson, D.A. & Harris, H. (1964) Phosphoglucomutase polymorphism in man. Nature, Lond. 204, 742.CrossRefGoogle ScholarPubMed