Other projects are aimed at more accurate assaying of hormone excretion to predict ovulation, foreknowledge of which is important to those practicing the rhythm method of family planning.

A $100,000 grant was made to the University of Lund, Sweden, for Dr. Lars Ph. Bengtsson's endocrinological research. He is investigating the physiological effects of devices inserted in the uterus to prevent impregnation. Because they are inexpensive, easily fitted, and may often be worn for several years, intrauterine contraceptives are attracting increased attention, through physiological research and extensive statistical trials. Scientists at the university hospital at Lund will study volunteers who have been fitted with several variations of intrauterine devices.

Harbor General Hospital, in Torrance (an affiliate of the University of California at Los Angeles), which also conducts investigation of the mode of action of intrauterine devices, received a new grant to enlarge a training program in reproductive biology for young post-resident physicians and postdoctoral biology students.

To help support research directed by Dr. Samuel M. McCann, a pioneer in neuroendocrinology, the University of Pennsylvania received a $122,300 grant. Dr. McCann and his associates are attempting to improve analysis of the several hormones secreted by the hypothalamus (a gland in the brain) that in turn activate or suppress other glandular regulators of ovulation. The research could improve understanding of precisely how oral contraceptives work. For another study of the role of the central nervous system in hormonal activity, the National Institute for Research in Dairying, in Reading, England, was assisted. The investigation involves studies with goats, whose neuroendocrine processes resemble the processes in humans more than those of common laboratory animals.

A complete list of 1964 grants in the Population program begins on page 135; projects, page 160; appropriations, page 102.