Studies Show that Nigeria Has The Highest Twinning Rate In The World

   A multiple pregnancy means that a woman has two or more babies in her uterus. These babies can come from the same egg or from different eggs. The occurrence and frequency of twinning, however, varies across human populations. The maternal age, socio-environmental factors, increase in the use of contraceptives, the race of human population, increase in the spontaneous abortion rate, and seasonal variations are among the factors that could influence twinning rate.

 
Information on twinning rates in southwest Nigeria is limited.

Delivery Rate   :
     A frequency of twin births of 46.5 per 1000 deliveries and 46.2 per 1000 deliveries was recorded for Ilesa and Ile-Ife respectively.
    The incidence of twinning among the races of the world has been extensively studied. Worldwide changes have occurred in the pattern of twinning rates in recent decades. The highest twinning rate is observed to occur among the Negroids, while the lowest occurred among the Mongoloid population. In Nigeria, the incidence of twinning was estimated to be 45‰.