Associations between father absence and age of first sexual intercourse.
Mendle J, Harden KP, Turkheimer E, Van Hulle CA, D'Onofrio BM, Brooks-Gunn J, Rodgers JL, Emery RE, Lahey BB. Associations between father absence and age of first sexual intercourse. Child Dev. 2009 Sep-Oct; 80(5):1463-80.