The endocrinology of the elephant estrous cycle has been well characterized, but little
emphasis has been placed on evaluating corresponding changes in the reproductive tract …

At present, the worldwide captive elephant population is not self‐sustaining. The major
reason for low reproductive rates is the heretofore undiagnosed reproductive disorders of …

Pituitary and corpus luteum hormone patterns throughout the elephant estrous cycle have
been well characterized. By contrast, analysis of follicular maturation by measurement of …

In reviewing the literature, this paper assesses the current level of understanding of the
hormonal control of the ovarian cycle and pregnancy in the elephant. Data are compiled …

The combination of a few factors, including poor captive reproduction, secession of
importation from the wild and advances in hormone detection and ultrasonography, has …

The reproductive rate of captive African elephants is low because of logistical difficulties
associated with transporting animals for breeding, the danger of maintaining bulls and …

Serum samples were collected from 3 mature female African elephants once each week for
15–18 months. Circulating concentrations of progesterone, oestradiol and LH were …

Considerable information now is available about the basic reproductive biology of
elephants, especially females. However, as important as this knowledge is, it no longer is …

Serum samples were collected weekly for 3 yr from two female African elephants, for 18 mo
from two other female African elephants, and for 2 yr from two female Asian elephants …

Previous attempts to characterize the estrous cycle of elephants have yielded conflicting
estimates of cycle length and LH profiles. In order to establish artificial breeding programs in …