Abstract: The present invention is directed to a method for inducing or stimulating, in anovulatory mares, the onset of fertile ovulation by administering, to an anovulatory mare, a gonadotrophin or gonatrophin-releasing substance at a rate with respect to time that maintains a substantially continuously present concentration of the substance in the mare sufficient to initiate an induced fertile ovulation.

Abstract: A method of determining in vivo an estimate of the modulus of elasticity of a bone. The method including the steps of applying an ultrasound beam to a limb from a transmitting transducer to a receiving transducer, and then measuring the flight times, T.sub.s for an ultrasound beam along a first path through the cortex of the bone, and T.sub.m along a second path through the cortex and medulla of said bone. After performing these steps, the method calculates the diameter X of the bone from the external diameter of the limb minus a predetermined constant allowing for skin and flesh, calculates the apparent velocity C.sub.a from X divided by T.sub.s, calculates the mean velocity V from X divided by T.sub.m, and calculates the cortical bone velocity C.sub.bE from a predetermined function f multiplied by C.sub.a. Next, the method determines a ratio R for the diameter of the medulla to the diameter of the cortex and then estimates the cross-sectional area CSA.sub.