NS  Vol.5 No.11 , November 2013
Natural background radiation dose rate levels and incidences of reproductive abnormalities in high radiation area in Abeokuta, Southwestern Nigeria
Abstract: A 10 y (1999-2008) birth records from two public and most accessible maternity hospitals locally in the city of Abeokuta, Nigeria were used to investigate the possible association of high outdoor gamma radiation exposure on reproductive abnormalities in the city. From the delivery record of 11,923 births in the period under study, a total number of 485 incidences of reproductive abnormalities were recoded. These incidences comprise 228 multiple births, 190 still births and, 67 premature births. Using the available terrestrial gamma radiation exposure data for the city and different reproductive abnormalities, regression assessment was carried out using the Pearson Product Moment (PPM) correlation statistics. The correlation showed that the incidences of reproductive abnormalities and the radiation dose levels were negatively correlated and correlation coefficient values were very low for each of the reproductive abnormalities considered. Factors such as socio-economic potentials of patients, dietary and other environmental factors may have substantial influence on the reproductive defects in the area other than radiation. However, the present study has added to the radiometric information needed in understanding the relationship between natural outdoor radiation exposure and occurrences of reproductive abnormalities in areas of high radiation in the country.
Cite this paper: Jibiri, N. and Famodimu, J. (2013) Natural background radiation dose rate levels and incidences of reproductive abnormalities in high radiation area in Abeokuta, Southwestern Nigeria. Natural Science, 5, 1145-1153. doi: 10.4236/ns.2013.511141.

[1]   Chongankar, M.P., Eppen, K.P. and Ramachanadara, T.V. (2003) Profiles of doses to population living in high background radiation areas in Kerala. Journal of Environmental Radioactivity, 71, 275-297.

[2]   Abel-Ghandy, H.A., El-Zakla, T. and Hassan, A.M. (2000) Environmental radioactivity of some Egyptian sand samples. Romanian Journal of Physics, 54, 213-223

[3]   Ghiassi, N.M., Zakeri, F., Assaei, R.G. and Kariminia, A. (2004) Long term immune and cytogenic effects of high level natural radiations on ramsar inhabitants in Iran. Journal of Environmental Radioactivity, 74, 107-116.

[4]   Samavat, H., Farzad, J., Hossein, M., Mahood, H. and Ali, S.M. (2005) Examination of the health effects of high natural background radiations among the residents of ramsar in Iran. International Congress Series, 1276, 8-12.

[5]   Padmanabhan, V.T., Sugunan, A.P., Brahmaputhran, C.K., Nanidi, K. and Pavithran, K. (1998) Heritable anomalies among the inhabitants of normal and high background radiations in Kerala: Result of a cohort study. Journal of Clinical Densitometry, 1, 379-383

[6]   Thampi, M.V., Cheryan, V.D., Jaikarishem, G., Gas, B. and Kurien, C.J. (2004) Investigation of health effect of human population exposure in the area with high level natural radiation in Kerala, Southwest Coast of India. International Congress Series, 1276, 162-165.

[7]   Sokolova, I.I., Malysheva, Z.V. and Tiutiunnik, I.F. (l998) Ecology and female reproductive system. Meditsina Truda Promyshlennaia Ekologiia, 9, 18-22.

[8]   Ashraf, E.M., Khater, R.M. and Higgy, M.P. (2001) Radiological impact of natural radioactivity in Abu-Tartor phosphate deposit in Egypt. Journal of Environmental Radioactivity, 55, 255-267.

[9]   Jibiri, N.N. (2001) Assessment of health risk associated with terrestrial gamma radiation dose rate levels in Nigeria. Environment International, 27, 21-26.

[10]   Farai, I.P., Obed, R.I. and Jibiri, N.N. (2006) Soil radioactivity and incidence of cancer in Nigeria. Journal of Environmental Radioactivity, 90, 29-36.

[11]   Farai, I.P. and Jibiri, N.N. (2000) Baseline studies of terrestrial outdoor gamma dose rate levels in Nigeria. Radiation Protection Dosimetry, 88, 247-254.

[12]   Obioha, F.I., Okonkwo, P.O., Agwu, K.K. and Okoye, I.J. (2003) Assessment of the impact of background gamma radiation on reproductive defects in two major Igbo towns of Nigeria. West African Journal of Radiology, 10, 4-7.

[13]   Obed, R.I., Farai, I.P. and Jibiri, N.N. (2005) Population dose distribution due radioactivity levels in 18 cities across Nigeria. Journal of Radiological Protection, 25, 305-312.

[14]   Farai, I.P. and Ademola, J.A. (2005) Radium equivalent activity concentrations in concrete building blocks in eight cities in Southwestern Nigeria. Journal of Environmental Radioactivity, 79, 119-125

[15]   Farai, I.P. and Vincent, U.E. (2006) Outdoor radiation level measurement in Abeokuta. Nigeria Journal of Physics, 18, 121-126.

[16]   Jibiri, N.N., Farai, I.P. and Alausa, S.K. (2009) Radiological hazard indices due to activity concentrations of radionuclide in farm soil from two high background radiation areas in Nigeria. International Journal of Low Radiation, 6, 79-95.

[17]   Jones, H.A. and Hockey, R.D. (1964) The geology of part of Southwestern Nigeria. Geological Survey of Nigeria Bulletin, 31, 1-101.

[18]   Parthasarathy, S.K. (2004) No major birth defects found in high level natural radiation areas of Kerala.

[19]   Balachandar, V., Kumar, R.K.M., Prakash, V., MohanaDevi, S., Kumar, B.L., Manikantan, P., Sasikala, K., Malathi, J., Brahmanadhan, M., Khanna, D. and Selvasekarapandia, S. (2011) Evaluation of genetic alterations in inhabitants of a naturally high background radiation and Kudankulam nuclear power project site in India. Asian Pacific Journal of Cancer Prevention, 12, 35-41.