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.