A cross-sectional study was carried out among 134 antenatal clinic attendees in a Nigerian tertiary hospital to assess pregnancy-related sexual beliefs and changes in sexual frequency and response. Information was collected through a semi-structured questionnaire, and analysed by SPSS. Only 15% of women believed that religious, social or cultural reasons prevented sexual intercourse in pregnancy. Frequency of sexual intercourse decreased in pregnancy in 37.4% of the respondents, remained unaltered in 46.1% and increased in 16.5%. Age, marriage duration and gestational age were not associated with change in the pattern of coital frequency in pregnancy, but education was significantly associated. Sexual responsiveness diminished in approximately half of our respondents in terms of arousal (54.5%), orgasm (48.5%), pleasure (43.7%) and satisfaction (51.4%). The changes were not associated with pregnancy duration. We concluded that sex in pregnancy is well accepted in our environment, and health workers should promote sexual health and well-being in pregnancy.