References
- Freely M, Pyper C. Pandora's Clock 1994. Cedar Press. 1994
- Clubb E M., Knight J. Fertility—Fertility Awareness and Natural Family Planning. David & Charles. 1987
- Howie P. Natural regulation of fertility. Br Med Bull 1993; 49: 182–99
- Perez A, Labbok M, Queenan J. Clinical study of the lactational amenorrhoea method for family planning. Lancet 1992; 339: 968–70
- Consensus Statement. Breast-feeding as a family planning method. Lancet 1988; 2: 1204–5
- Gross B. Breastfeeding and the return of fertility. Report, Endocrine Unit, Department of Medicine, Westmead Centre. NSW, Australia. 1983
- Vessey M, Smith A, Yeates D. Return of fertility after discontinuance of oral contraceptives - influence of age and parity. Br J Fam Plann 1986; III: 120–40
- Aral S. Sexual behaviour as a risk factor sexually transmitted diseases. Reproductive Tract Infections: Global Impact and Priorities for Women's Health, Part III, A Germain, K Holmes, P Piot, et al. International Women's Health Coalition, New York
- Bromwich P. Br J Sex Med October, 1985; 124–5
- Chretien F C., Cohen J. Human cervical mucus during the menstrual cycle and pregnancy in normal and pathological conditions. J Reprod Med 1975; 14: 192–6
- World Health Organization. A prospective multicentre trial of the ovulation method of natural family planning: II. The effectiveness phase. Fertil Steril 1981; 36: 591–4
- Barrett J C., Marshall J. The risk of conception on different days of the menstrual cycle. Pop Stud 1969; 23: 455–61
- Marshall J. Thermal changes in the normal menstrual cycle. Br Med J 1963; 1: 102
- Frank-Herrmann P, Freundl G, Baur S, et al. Effectiveness and acceptability of the sympto-thermai method of natural family planning in Germany. Am J Obstet Gynecol 1991; 165: 2052–4
- Barbato M, Bcrtolotti G. Natural methods of fertility control: a prospective study of 460 couples. Presented at IV Congress of the International Federation for Family Life Promotion. SerenaCanada 1986, abstr.
- Clubb E M., Pyper C M., Knight J. A pilot study on teaching natural family planning in general practice. Proceedings of the Conference at Georgetown University. Washington, DC 1991
- Collins W P. The evolution of reference methods to monitor ovulation prediction. Am J Obstet Gynecol 1991; 165: 1994–6
- Collins W P. Ovulation and the fertile period. Med Forum 1985; 17
- World Health Organization. Task Force. 1970
- Flynn A, Docker M, Morris R, Lynch S, Royston J. The reliability of women's subjective assessment of the fertile period, relative to urinary gonadotrophins and follicular ultrasonic measurements during the menstrual cycle. Research in Family Planning, J Bonnar, W Thompson, RF Harrison. MTP Press, LancasterEngland 1983; 3–11
- Wilcox A, Weinberg M, Baird D. Timing of sexual intercourse in relation to ovulation. Effects on the probability of conception, survival of the pregnancy, and sex of the baby. N Engl J Med 1995; 333: 1517–21
- Perez A, Labbok M, Barker D, Gray R. Use effectiveness of the ovulation method initiated during postpartum breastfeeding. Contraception 1998; 38: 499–508