Studies which reported more than a twofold elevation in risk
* m. Segi, et al "an epidemiological study on cancer in japan," gann, vol. 48, supplement: april, 1957.
* pike et al (1981) br journal of cancer 43 oral contraceptive use and early abortion as risk factors for breast cancer in young women
* nishiyama (1982) shikoku ichi 38: 333-43 (in japanese)
* laing et al (1993) j national med assoc. 85:931-9 breast cancer risk factors in african - american women: the howard university tumor resistry experience.
* laing et al (1994) genetic epidemiology 11:a300
* rohan et al. Am j epidemiol 1988 sep;128(3):478-89
a population-based case-control study of diet and breast cancer in australia.
* bu et al. (1995) am j epidemiol 141:s85
other studies which show increased risk
* ye et al. (2002) br j cancer 87:977-981
* brinton et al. (1983) br. Journal of cancer 47:757-62
reproductive factors in the etiology of breast cancer.
* rosenburg et al. (1988) am j epidemiology 127:981-9
breast cancer in relation to the occurrence and time of induced and spontaneous abortion.
* marcus et al. Am j public health 1999 aug; 89(8):1244-7
adolescent reproductive events and subsequent breast cancer risk.
* palmer et al. (1997) cancer causes control 8:841-9
induced and spontaneous abortion in relation to risk of breast cancer.
* lazovich et al. Epidemiology 2000 jan;11(1):76-80
induced abortion and breast cancer risk.
* daling et al. Am j epidemiol 1996 aug 15;144(4):373-80
risk of breast cancer among white women following induced abortion.
* daling et al. J natl cancer inst 1994 nov 2;86(21):1584-92
risk of breast cancer among young women: relationship to induced abortion.
* laing et al. J natl med assoc 1993 dec;85(12):931-9
breast cancer risk factors in african-american women: the howard university tumor registry experience.
* white et al. (1994) j natl cancer inst 86:505-14
breast cancer among young u.S. Women in relation to oral contraceptive use.
* newcomb et al. (1996) jama 275:283-7
pregnancy termination in relation to risk of breast cancer.
* howe et al. Int j epidemiol 1989 jun;18(2):300-4
early abortion and breast cancer risk among women under age 40.
* andrieu et al. Br j cancer 1995 sep;72(3):744-51
familial risk, abortion and their interactive effect on the risk of breast cancer--a combined analysis of six case-control studies.
* hirohata et al. (1985) natl cancer inst monogr 69:187-90
occurrence of breast cancer in relation to diet and reproductive history: a case-control study in !**@!, japan.
* ewertz & duffy (1988) br j cancer 68:99-104
risk of breast cancer in relation to reproductive factors in denmark.
* lipworth et al. (1995) int j cancer 61:181-4
abortion and the risk of breast cancer: a case-control study in greece
* rookus & van leeuwan j natl cancer inst 88:1759-64
induced abortion and risk for breast cancer: reporting (recall) bias in a dutch case-control study
* talamini et al. (1996) eur j cancer 32a:303-10
the role of reproductive and menstrual factors in cancer of the breast before and after menopause
* watanabe & hirayama (1968) nippon rinsho 26:1853-9
* dvoirin & medvedev (1978) meth prog breast cancer epidemiol res, tallin 1978. Ussr acad sci pp 53-63 (in russian)
* le et al., (1984) british j cancer 72:744-51
* luporsi (1988) british j cancer 72:744-51
* wu et al. (1996) br j cancer 73:680-6
* robertson c, van den donk m, primic-zakelj, macfarlanet, boyle p. The association between induced and spontaneous abortion and risk of breast cancer in slovenian women aged 25-54. Breast 2001; 10:291-8.
Studies showing link between delayed first full term pregnancy and breast cancer
* russo et al. Breast cancer res treat 1992;23(3):211-8
influence of age and parity on the development of the human breast.
* macmahon, b. Et al "age at first birth and breast cancer risk,"
bull. Wld health org., 1970; (43-209-21) study reported "it is estimated that women having their first child when aged under 18 years have only about one-third the breast cancer risk of those whose first birth is delayed until the age of 35 or more." its data also revealed a "suggested increased risk associated with abortion -- contrary to the reduction in risk associated with full-term births."
* macmahon, b. Et al "age at first birth and breast cancer risk," (same as above) bull. Wld health org., 1970; (43-209-21) study reported "it is estimated that women having their first child when aged under 18 years have only about one-third the breast cancer risk of those whose first birth is delayed until the age of 35 or more." its data also revealed a "suggested increased risk associated with abortion -- contrary to the reduction in risk associated with full-term births."
* segi m., et al "an epidemiological study on cancer in japan," gann, vol. 48, supplement: april, 1957segi et al (1957) gann 48 (suppl) : 1-63
studies which did not show an increased risk:
* sanderson m, shu x-o, jin f, dai q, wen w, hua y, gao y-t, zheng w. Abortion history and breast cancer risk: results from the shanghai breast cancer study. Int j cancer 2001;92:899-905
* moseson et al. (1993) int j epidemiology 22:1000-9
the influence of medical conditions associated with hormones
on the risk of breast cancer.
* melbye et al. N engl j med 1997 jan 9; 336(2):81-5
induced abortion and the risk of breast cancer
* burany (1979) jugosl genekol opstet 19:237-47 (serbo-craot)
* la vecchia et al. (1993) int j cancer 53:215-9
* zaridze et al (1988) "unpublished" and referenced in br j cancer 72:744-51
* sanderson et al. Amer j epidemiology, june 1, 2000;151 (11)
abortion history and breast cancer risk: results from the shanghai breast cancer study.
* adami et al. (1990) br j cancer 62:122-6
absence of association between reproductive variables and the risk of breast cancer in young women in sweden and norway.
* newcomb pa, mandelson mt. A record-based evaluation of induced abortion and breast cancer risk (united states). Cancer causes control 2000; 11:777-81.1
* goldacre mj, kurina lm, seagroatt v, yeaates. Abortion and breast cancer: a case-control record linkage study. J epidem community health 2001;55:336-7.
* mahue-giangreco m. Ursin g. Sullivan-halley j. Bernstein l. "induced abortion, miscarriage, and breast cancer risk of young women." cancer epidemiology biomarkers & prevention vol. 12, 209-214, march 2003.
* erlandsson g. Montgomery s. Cnattingius s. Ekbom a. Abortions and breast cancer: record-based case-control study. Int j cancer (2003) 103:676-679.