Scientific Issues in NFP
Billings, E.L., & Billings, J.J. (1977). Pregnancy investigation. International Review of Natural Family Planning, 1(1), 35-39.
Bracken, M.S. (1983/March). Frequency of non-hormonal contraception around conception and association with congenital malformations in offspring. American Journal of Epidemiology, 117(3), 281-291.
Dewan, E.M. (1979/December). On the possibility of a perfect rhythm method of birth control by periodic light stimulation. American Journal of Obstetrics and Gynecology, 99, 1016-1019.
Fordney-Steelage, D. (1981). A review of cervical mucus and sperm interactions in humans. International Journal of Fertility, 26(3), 161-169.
France, J.T., Graham, F.M., Gosling, L., Hair, P., & Knox, B.S. (1992). Characteristics of natural conceptual cycles occurring in a prospective study of sex preselection: Fertility awareness symptoms, hormone levels, sperm survival, and pregnancy outcomes. International Journal of Fertility, 37, 244-255.
Gray, R.H. (1984). Aged gametes, adverse pregnancy outcomes and natural family planning: An epidemiologic review. Contraception, 30(4), 297-309.
Gray, R.H., & Kambic, R.T. (1988). Epidemiological studies of natural family planning. Human Reproduction, 3, 693-698.
Gray, R.H. (1991). Natural family planning and sex selection: Fact or fiction? American Journal of Obstetrics and Gynecology, 165, 1982-1984.
Guerrero, R., & Lanctot, D. (1970/May). Aging of fertilizing gametes and spontaneous abortion: Effect of the day of ovulation and the time of insemination. American Journal of Obstetrics and Gynecology, 107, 263-267.
Guerrero, R. (1978/November). The aging of gametes: The known and the unknown. Linacre Quarterly, 45(4), 345-357.
Guerrero, V., & Guerrero, R. (1970). Sex ratio: A statistical association with the type and time of insemination in the menstrual cycle. International Journal of Fertility, 15, 221-225.
Hilgers, T.W. (1977/September). The protection afforded by the cervical mucus in human reproduction. Bulletin National Family Planning Council Vict, 4-12.
Jennings, V. (1992). Major research issues in natural family planning. Advances in Contraception, 8, 185.
Jochle, W. (1973/June). Coitus-induced ovulation. Contraception, 7, 523-564.
Jongbloet, P.H. (1985). The aging gamete in relation to birth control failures and Down syndrome. European Journal of Pediatrics, 144(4), 343-347.
Kambic, R., Gray, R.H., & Simpson, J.L. (1988). Aging gametes and NFP: What is currently known? International Review of Natural Family Planning, 12(3), 226-249.
Kambic, R., & Gray, R.H. (1989). Interobserver variation in estimation of day of conception intercourse using selected natural family planning charts. Fertility and Sterility, 51, 430-434.
Kambic, R., Gray, R.H., & Simpson, J.L. (1989). Outcome of pregnancy in users of natural family planning. International Journal of Gynecology and Obstetrics, 1 [supplement], 99-110.
Klaus, H. (1981). Natural family planning: A review. Obstetrical and Gynecological Survey, 37(2), 128-150.
McCusker, M.P. (1982). The subfertile couple. JOGN Nursing, 11(3), 157-162.
Mancuso, S., Fulghesu, A.M., Di Simone, N., Riccardi, P., Vitale, E., Castellani, R., Bellante, F.P., & Lanzone, A. (1991). Changes in fatty acids sebum composition during human menstrual cycle: Possible relationships with fertile period. Acta Europaea Fertilitatis, 22, 43-45.
Mettler, L. (1990). Cervical factors in infertility. Current Opinion in Obstetrics & Gynecology, 2, 193-199.
Nerbun, B., & Carter, P. (1982). The scientific basis of the ovulation method of natural family planning. Bulletin of the South Carolina Academy of Science, 44, 77.
Perez, A., Eger, R., Domenichini, V., Kambic, R., & Gray, R.H. (1985). Sex ratio associated with natural family planning [letter]. Fertility and Sterility, 43(1), 152-153.
Reame, N.E. (1992). A prospective study of the menstrual cycle and spinal cord injury. American Journal of Physical Medicine and Rehabilitation, 71, 15-21.
Roetzer, J. (1988). Natural family planning and pregnancy outcome. International Journal of Fertility, 33 [supplement], 40-42.
Simpson, J.L., Gray, R.H., Queenan, J.T., Mena, P., Perez, A., Kambic, R.T., Tagliabue, G., Pardo, F., Stevenson, W.S., Barbato, M. (1988). Pregnancy outcome associated with natural family planning NFP scientific basis and experimental design for an international cohort study. Advances in Contraception, 4, 247-264.
Simpson, J.L., Gray, R.H., Queenan, J.T., Kambic, R.T., Perez, A., Mena, P., Barbato, M., Pardo, F., Tagliabue, G., Bitto, A., Stevenson, W.S. (1991). Fetal outcome among pregnancies in natural family planning acceptors: An international cohort study. American Journal of Obstetrics and Gynecology, 165, 1981-1982. [Supplement, 2, 165-166.
Simpson, J.T., Gray, R.L., Queenan, J.T., Kambic, R.T., Perez, A., Mena, P., Barbato, M., Pardo, F., Tagliabue, G., et al. (1992). Assessing safety in natural family planning users. Advances in Contraception, 8, 185-186.
Van Look, P.F.A., & Mancuso, S. (1989). Natural fertility regulation today. International Journal of Gynecology and Obstetrics, [supplement 1], 1-167.
Vrbicky, K.W., Wells, I.C., Hilgers, T.W., Kable, W.T., Baumstark, J.S., & Elias, C.J. (1982). Evidence for the involvement of beta-endorphin in the human menstrual cycle. Fertility and Sterility, 38, 701-704.
World Health Organization. (1984). A prospective multicenter study of the ovulation method of natural family planning IV: The outcome of pregnancy. Fertility and Sterility, 41(4), 593-598.
World Health Organization. (1985). A prospective multicenter study to develop universal immunochemical tests for predicting the fertile period in women. International Journal of Fertility, 30(3), 18-30.
Yudin, A.I., Hanson, F.W., & Katz, D.F. (1989). Human cervical mucus and its interaction with sperm: A fine-structural view. Biology of Reproduction, 40, 661-671.
Zarutskie, P.W., Muller, C.H., Magone, M., & Soules, M.R. (1989). The clinical relevance of
sex selection techniques. Fertility & Sterility, 52, 891-905.