In 1984, half of married/cohabiting Canadian women aged 18-49 years were using contraception, with sterilisation being the most prevalent method. This study, using data from the 1984 Canadian Fertility Survey of 5315 women aged 18-49 years, found that there was a preference for sons. Women with two sons are more likely to use contraception than those who have had two daughters; the gender of children may have a weak effect on contraceptive behaviour of Canadian couples at higher parities. Sociocultural factors (e.g. education, religion, religiosity) were also found to influence contraceptive behaviour.