Ni igbamiran(isele yi ko wopo), awon ibeji kan le ni baba meji otooto.Statistiki Ni gbogbo agbaye, eya Yoruba ni awon omo won n ya ibeji ju, awon ibeji 45 si 50(awon omo 90 si 100) ni o n ya ibeji ninu gbogbo omo egberun ti won ba bi.Awon Itokasi.. 
Adiele Eberechukwu afigbo (born 22 November 1937 — 9 March 2009) je ojogbon onimo itan omo ile Naijiria lati eya Igbo.Ìtọ́kasí ara Naijiria.. 