REFERENCES
- Forrest JD. Epidemiology of unintended pregnancy and contraceptive use. Am J Obstet Gynecol 1994; 170:1485–98
- Kaufmann RB, Morris L, Spitz AM. Comparison of two question sequences for assessing pregnancy intentions. Am J Epidemiol 1997;145:810–16
- Bongaarts J. Trends in unwanted childbearing in the developing world. Stud Fam Plann 1997;28:267–77
- Popov I, Khristova I, Stoikov S. Sex behavior and contraception among the population of Romany origin. Akush Ginekol 1999;38:25–7
- Shupe AK, Smith AE, Stout CL, McLaughlin H. The importance of local data in unintended pregnancy prevention programming. Matern Child Health J 2000;4:209–14
- Lete I, Bermejo R, Coll C, et al. Use of contraceptive methods in Spain: results of a national survey. Contra- ception 2001;63:235–8
- Fu H, Darroch JE, Haast T, Ranjit N. Contraceptive failure rates: new estimates from the 1995 National Survey of Family Growth. Fam Plann Perspect 1999; 31:56–63
- Lete I, Bermejo R, Coll C, et al. Fuentes de información sobre los métodos anticonceptivos de las mujeres espa olas en edad fértil. Progr Obstet Ginecol 2001; 44:28–32
- Toulemon L, Leridon H. Contraceptive practices and trends in France. Fam Plann Perspect 1998;30:114–20
- Piccino LJ, Mosher WD. Trends in contraceptive use in the United States. Fam Plann Perspect 1998;30:4–10
- Cheng Y, Zhu W, Li Z, Zhang Y, Wang A. Contra- ceptive practices of women requesting termination of pregnancy: a study from China. Contraception 1997; 55:15–17
- Sable MR, Libbus MK, Chiu JE. Factors affecting contraceptive use in women seeking pregnancy tests: Missouri, 1997. Fam Plann Perspect 2000;32:124–31
- Plaza E, Ruiz de Adana J, Alguacil P, et al. An epidemio-logical study of unwanted pregnancy. Atención Primaria 1994;13:77–9
- Henshaw SK. Unintended pregnancies in the United States. Fam Plann Perspect 1998;30:24–9
- Denton AB, Scott KE. Unintended and unwanted pregnancy in Halifax: the rate and associated factors. Can J Pub Health 1994;85:234–8
- Okonofua FE, Odimegwu C, Ajabor H, Daru PH, Johnson A. Assessing the prevalence and determinants of unwanted pregnancy and induced abortion in Nigeria. Stud Fam Plann 1999;30:67–77
- Banerjee N, Sinha A, Kriplani A, Roy KK, Takkar D. Factors determining the occurrence of unwanted pregnancy. Natl Med J India 2001;14:211–14
- Price SJ, Barrett G, Smith C, Paterson C. Use of contra-ception in women who present for termination of pregnancy in inner London. Pub Health 1997;111:377–82
- Pinto JL. Pregnancy during adolescence: wanted vs. unwanted. Int J Gynaecol Obstet 1998; 63(Suppl 1): S151–6
- Kahn JG, Brindis CD, Glei DA. Pregnancies averted among U.S. teenagers by the use of contraceptives. Fam Plann Perspect 1999;31:29–34
- Olinto MT, Galvao LW. Reproductive characteristics of women from 15 to 49 years of age: comparative studies and planning for actions. Rev Saudade Publica 1999;33:64–72
- Petersen R, Moos MK. Defining and measuring unintended pregnancy: issues and concerns. Wom Health Issues 1997;7:234–40