In this study, we found that total CL weight was similar in cows with single and double
ovulations, and in animals with double ovulations the weight of the individual CL was about
half that of animals with single ovulations. The reason for this difference is not known and
despite this difference in the size of individual CL, the distribution in the stage of embryo
development and in the proportion of animals with embryos present was similar between
single and double ovulating animals. Within double ovulating animals the mean weight of
the smaller (1.2±0.2 g) and larger CL (1.4±0.2 g) were not significantly different and no
differences were detected between the stages of development of the embryos.