Abstract
Luteinizing hormone was extracted from the pituitary of cattle foetuces, and its content was determined by the bioassay method on the rat ventral prostate weight (GREEP et al. 1942).
LH was found in the extract obtained from the foetal pituitary of both sexes from the 5th month of gestation. The content of the pituitary hormone seemed to increase with the progress of gestation.
The luteinizing hormone content was higher in the male pituitaries than in the female ones, and this difference became remarkable in the foetuses of the 89th month of gestation.
