英语语法分析

There was no difference in the ovarian organization among unpregnant, pregnant experimental mice and control mice.

未妊娠组、妊娠组和对照组小鼠卵巢组织无明显差异。

There was no difference about ovarian histology among unpregnant, pregnant experimental mice and control mice.

免疫组未怀孕小鼠与免疫组怀孕小鼠及对照组小鼠的卵巢组织均未观察到病理学变化。