The demonstration that changes in mammalian sexual behavior frequently parallel changes in female endocrine status has led to a variety of experiments designed to investigate cause and effect. The relations appear to be circular as shown by experiments that manipulate either variable. In non-human experiments the findings are clear. Whether naturally occurring or experimentally induced, changes in endocrine state effect subsequent sexual behavior in rat (Weizenbaum, 1976; Zemlan & Adler, 1977...
