Walters W A, Wood C
Br J Obstet Gynaecol. 1977 Jan;84(1):26-30. doi: 10.1111/j.1471-0528.1977.tb12461.x.
A double blind clinical trial of oral ritodrine for prevention of premature labour was conducted in 38 primigravidae in whom the internal os of the cervix was one or more fingerbreadths dilated at 28 to 32 weeks gestation. The results suggest that oral ritodrine may not be effective in preventing premature labour.
一项关于口服利托君预防早产的双盲临床试验在38名初产妇中进行,这些初产妇在妊娠28至32周时宫颈内口扩张达一个或多个指宽。结果表明,口服利托君可能无法有效预防早产。