Published in: 01-06-1997 Pregnancy complications in natural family planning users Authors: P. Mena, A. Bitto, M. Barbato, A. Perez, R.H. Gray, J.L. Simpson, J.T. Queenan, R.T. Kambic, F. Pardo, W. Stevenson, G. Tagliabue, V. Jennings, C. Li Published in: Advances in Contraception | Issue 2-3/1997 Login to get access