first intercourse

Associations between source of information about sex and sexual health outcomes in Britain: findings from the third National Survey of Sexual Attitudes and Lifestyles (Natsal-3)
Wendy Macdowall, Kyle G Jones, Clare Tanton, Soazig Clifton, Andrew J Copas, Catherine H Mercer, Melissa J Palmer, Ruth Lewis, Jessica Datta, Kirstin R Mitchell, Nigel Field, Pam Sonnenberg, Anne M Johnson, Kaye Wellings

BMJ Open Mar 2015, 5 (3) e007837; DOI: 10.1136/bmjopen-2015-007837

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first intercourse