英语语法分析

The progesterone contents of peripheral serum of 5 Guizhou Xiang gilts and 5 Shanghai mini-gilts were determined during their oestrous cycles and early pregnancy by a radioimmunoassay method.

测定了5头贵州香猪和5头上海小型猪发情周期和妊娠早期外周血清的孕酮含量。