Objective To establish whether women's preference for elective caesarean section (ELCS) changes as gestation advances.Design A prospective longitudinal observational study.Setting Two units providing obstetric care in Hong Kong, one public and one private.Sample Five hundred and one nulliparous Chinese pregnant women attending their routine fetal anomaly scan in either unit.Methods Consented subjects had two interviews using a structured questionnaire at 18-22 weeks and 35-37 weeks of gestation, respectively. Multivariate analysis was performed to identify determinants for preferring ELCS at the two gestational ages.Main outcome measure The preferences for the mode of delivery at the two gestational ages.Results The prevalence of maternal preference for ELCS in the study cohort was 17.2% (95% CI 13.9-20.5) and 12.7% (95% CI 9.6-15.8) at mid-trimester and at term, respectively. Significantly more women who preferred ELCS at mid-trimester changed to a trial of vaginal delivery (VD) at term than vice versa (42.0 versus 3.8%). The partner's preference for ELCS was a significant determinant for women preferring ELCS throughout the antenatal period. Among the women booked in the public sector, more women who preferred ELCS at term changed to deliver in private hospitals than those who preferred VD (46.2 versus 9.7%).Conclusions Many women changed from preferring ELCS to preferring VD as their pregnancy approached term. The partner's preference was a significant determinant for the women's choice. If a decrease in the proportion of women preferring ELCS is desired, the intervention programme should target the women and their partners who hold such a preference at 20 weeks.

Orthopedic surgeons understand the benefits of and are supportive of the use of regional anesthesia in their practices. Barriers to increased popularity include perceived operating room delays and lack of reliability.

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Health care professionals planning conferences in this era of new respiratory diseases can benefit from understanding the responses of delegates who attended conferences during outbreaks. Clear communication about the potential risks and benefits, as well as instituting full screening precautions, will help to allay concerns.