Is Canada's sex ratio in decline?

CMAJ. Canadian Medical Association Journal

Volumn 156, Issue 1, 1997, Pages 46-48

  Dodds, Linda ^a,c   Armson, B A ^b  

^a DALHOUSIE UNIVERSITY   (Canada)

^b Reproductive Care Program of Nova Scotia   (Canada)

^c IWK HEALTH CENTRE   (Canada)

Author keywords

[No Author keywords available]

Indexed keywords

BIRTH RATE; CANADA; ETHNIC GROUP; FEMALE; HUMAN; INCIDENCE; INFERTILITY; MALE; MATERNAL AGE; MIGRATION; NEWBORN; NOTE; POLLUTION; PREGNANCY; RISK FACTOR; SEX RATIO; SPONTANEOUS ABORTION;

ABORTION, SPONTANEOUS; BIRTH RATE; CANADA; EMIGRATION AND IMMIGRATION; ENVIRONMENTAL POLLUTION; ETHNIC GROUPS; FEMALE; HUMANS; INCIDENCE; INFANT, NEWBORN; INFERTILITY; MALE; MATERNAL AGE; PREGNANCY; RISK FACTORS; SEX DISTRIBUTION; SEX RATIO;

EID: 0030639607     PISSN: 08203946     EISSN: 14882329     Source Type: Journal    
DOI: None     Document Type: Article

References (26)

1. James WH. The human sex ratio. Part 1: A renew of the literature. Ham Biol 1987;59(5):721-52.
2. Ulizzi L, Zonta LA. Factors affecting the sex ratio in humans: multivariate analysis of the Italian population. Hum Biol 1995;67(l):59-67.
3. Erikson JD. The secondary sex ratio in the United States 1969-71: association with race, parental ages, birth order, paternal education and legitimacy. Hum Genet 1976;40:205-12.
4. Teitelbaum MS, Mantel N. Socio-economic factors and die sex ratio at birth. JBiosocScil97\;l:2)-4l.
5. James WH. Time of fertilization and sex of infants. am-f r 1980;!:! 124-6.
6. James WH. Gonadotrophin and the human secondary sex ratio. BMJ 1980;281:711-2.
7. James WH. The sex ratio of infants bom after hormonal induction of ovulation. BrJ Obstet Gynaecol 1985;92:299-301.
8. Dickey RP, Taylor SN, Curole DN, Rye PH. Male birth rates are influenced by the insemination of unselected spermatozoa and not by clomiphene citrate. Human Rffrod 1995;10:761-4.
9. Proceed n'itb care: Final report of the Royal Cominission on AVi2 Reproductive Technologies. Vol 1. Ottawa: Canada Communications Group, 1993:187-9.
10. Wilcox LS, Mosher WD. Use of infertility services in the United States. ObstetGyncal\99}2:m-7.
11. Births 1991. Ottawa: Statistics Canada, 1991:43. Cat no 84-210.
12. Williams FLR, Ogston SA, Lloyd OL. Sex ratios of births, mortality, and air pollution: Can measuring the sex ratios of births help to identify health hazards from air pollution in industrial environments? Occup Environ Med 1995;S2:164-9.
13. Lloyd OL, Lloyd MM, Holland Y, Lyster WR. An unusual sex ratio of births in an industrial town with mortality problems. BrJ Obstet Gynaeal 19S4; 91:901-7.
14. Lloyd OL, Smith G, Lloyd M, Holland Y, Garley F. Raised mortality from lung cancer and high sex ratios of births associated with industrial pollution. BrJIndMed 1985;42:475-80.
15. Whorton D, Krauss S, Marshall S, Melby T. Infertility in male pesticide workers, lancet 1977:2:1259-61.
16. James WH. Occupations associated with low offspring sex ratios. Am J Ina Med 1994;25:607-8.
17. Whorton MD, Haas JL, Trent L, Wong O. Reproductive effects of sodium borates on male employees: birth rate assessment. Occup Environ Med 1994;51:761-75.
18. Milham S. Unusual sex ratio of births to carbon setter fathers. Am J Ind Med 1993;23:829-31.
19. Dickinson H, Parker L. Do alcohol and lead change the sex ratio? 7TbeorBiol 1994;169:313-5.
20. Carlsen E, Giwereman A, Kerding N, Skakkebark NE. Evidence for decreasing quality of semen during the past 50 years. BMJ 1992j305:609-13.
21. Auger J, Kunstmann JM, Czyglik F, Jouannet P. Decline in semen quality among fertile men in Paris during the past 20 years. N Engl J Med 1995;332:281-5.
22. Fisch H, Goluboff ET, Oison JH, Feldshuh J, Broder SJ, Barad DH. Semen analyses in 1283 men from the United States over a 25-year period: no decline in quality. Fertil Steril 1996;65:909-11.
23. Dodds L. Prevalence of smoking among pregnant women in Nova Scotia from 1988 to 1992. Can MidAssocJ 1995;152:185-90.
24. James WH, Rostron J. Parental age, parity and sex ratio in births in England and Wales, 1968-n.JBiosocSci 1985;I7:47-56.
25. Ulizzi L, Zonta LA. Sex ratio and natural selection in humans: a comparative analysis of two Caucasian populations. Ann Hum Genet 1993;57:211-9.
26. James WI I. What stabilizes the sex ratio? Ann Hum Genet 1995;59:243 -9.