Prolonged postpartum acyclicity in suckled beef cows is a source of economic loss to beef
cattle producers. Duration of postpartum acyclicity is influenced by suckling status, nutritional …

It is now known that pheromonal communication plays an important role in mammalian
behaviour and reproductive processes. Chemical communication with pheromones is one …

Puberty in heifers is attained after a period of 6 to 24 months postnatal maturation, which,
from a teleological standpoint, may be said to allow the process of natural selection to delay …

A number of morphological and biochemical changes occur as the cells of the recently
ovulated follicle luteinize and develop into a functional CL. There are two distinct …

The pattern of concentrations of progesterone in plasma was characterized by two transient
increases prior to puberty. The source of these increases of progesterone was studied in …

The effects of bull urine on the percentage of heifers reaching puberty and on subsequent
calving dates were examined with 52 crossbred beef heifers. Heifers were palpated for …

By utilizing estrogen and progesterone, it appeared possible to mimic the changes occurring
in blood hormone levels near puberty. This suggested the possibility of induction of puberty …

Abstract Peripubertal beef heifers (n= 57) and postpartum multiparous cows (n= 52) were
used to determine the optimal dose of estradiol benzoate (EB) to induce and synchronize …

Abstract Crossbred heifers (n= 75) fed for rapid (R;. 82 kg/d) or slow-then-rapid (SR;. 41 kg/d
for 90 d then. 82 kg/d) postweaning gain were used to examine the effects of age or pattern …

Animals communicate information c0ncerning reproduction to conspecifics in order to
coordinate reproductive activities. Chemical communication with pheromones is one means …