Recent progress in hormone research.

Summary of steroid sex hormone therapy.

The infections of childhood, measles, scarlet fever, diphtheria, and above all mumps, may so damage the hormone system that an inversion of sex type follows.

Whether one or the other sex tendency will dominate depends upon the quantity of sex hormone divergence from the ideal normal.

Others will show an intense curiosity spontaneously, a curiosity which perhaps may be explained as a larval precocity, dependent upon the minimum of sex hormone production by the gonads.

Periodic examinations, to check up the balance sheets of the hormone factories and to measure the amount of their damage by means of blood analyses, will provide the most valuable method in the campaign to lengthen the productive and enjoying span of life.

If we are to look for unit factors at all in endocrine heredity, we must look more deeply into constitution, and measure the hormone potentials and their mobilization or suppression.