Crossword-Solution: LUTEAL 6 letters, 1 clue 🏆 scrabble score: 6

Marshall himself examined sections of the corpus luteum of _Ornithorhynchus_ and saw much hypertrophied and apparently fully developed luteal cells, but no trace of any ingrowth from the wall of the follicle.

While the “reasoning” that led to the experiment is open to serious question, nevertheless the “hint” furnished by the unusual condition of the testis led finally to the discovery that luteal cells were present in abundance in the testes of the male Sebright like those present only in the females of other breeds.

Whether or not the shape of the testis of the Sebright, that is sometimes like that of the ovary, is connected with the unusual abundance of luteal cells in the testis I do not know.

Glandular cells like the luteal cells of the ovary have in fact been described by some observers in other organs of the body.

Many other substances were also tried by Boring and Pearl, but none of them dissolved the yellow pigment, which reacts in this respect in the same way as does the yellow pigment in the luteal cells of the mammal.