Impact of timing of sex education on teenage pregnancy in Nigeria: cross-sectional survey of secondary school students.
Ochiogu
Ifeoma N
IN
Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio Campus, PO Box 1627, 70211 Kuopio, Finland. ifeoma.ochiogu@uef.fi
Miettola
Juhani
J
Ilika
Amobi L
AL
Vaskilampi
Tuula
T