The incidence of triplets and higher multiple births in some rural and urban populations in Western Nigeria.
D005260:Female; D005306:Fertilization; D006801:Humans; D008297:Male; D009549:Nigeria; D010063:Ovum; D011247:Pregnancy; D011272:Pregnancy, Multiple; D011783:Quadruplets; D012424:Rural Population; D012744:Sex Ratio; D013223:Statistics as Topic; D014310:Triplets; D014427:Twins; D014505:Urban Population