This survey on sex preference was done in 5 Basic Health and Maternal-Child Health Centers in the region of Tunis, Tunisia. A questionnaire was presented to a sample of 200 women of various social positions, 75% of them were 30 years old. 95% of the sample had several children, 50% had more than 3. When asked what sex was their preference for their next children, 38% wanted sons, 36% wanted girls. They said that their husbands preferred to have sons. Women preferred a son when a majority of their children were girls, unlike the fathers who were said to prefer sons, even though sons were already a majority of their children. 67% of the women wanted to know the sex of their future child before birth (Only 36% were in that state of mind in France at that time). 58% of the women wished to have the control of the determination of their future child's sex. These trends toward the control of a child's sex follow a traditional pattern, which reinforces the acceptability of modern medical methods.