Results 181 to 190 of about 30,379 (234)

Apoptosis in the Estrous and Menstrual Cycles

Journal of Mammary Gland Biology and Neoplasia, 1999
In the absence of pregnancy, the adult mammary gland is subjected to cyclic fluctuations of hormonal stimulation that constitute the estrous and menstrual cycles. The mammary epithelium responds to these systemic hormonal changes by regional proliferation, differentiation and cell death by apoptosis.
Andres AC, Strange R
openaire   +3 more sources

The estrous cycle in the dog: A review

Theriogenology, 1977
Abstract Clinical, morphologic and hormonal changes throughout the estrous cycle in the dog are discussed in relation to the well established stages in this species — proestrus, estrus, metestrus and anestrus. Although most efforts in the past have been devoted to the period of reproduction, events throughout the remaining months of the cycle are ...
W, Jöchle, A C, Andersen
openaire   +2 more sources

Estrous Cycle and Ovulation in the Mare

Journal of the American Veterinary Medical Association, 1972
SUMMARY Length of estrous cycle and ovarian activity in the nonpregnant mare is related to season of the year and should not be characterized independently of season. Studies at the University of California have indicated that 75 to 85% of mares develop signs of estrus and ovulate from April through October, but these responses to endocrine activity ...
J P, Hughes, G H, Stabenfeldt, J W, Evans   +2 more
openaire   +2 more sources

The Estrous Cycle of Coyotes

The Journal of Wildlife Management, 1976
The estrous cycle in coyotes (Canis latrans) is characterized by a long proestrus (2-3 months). Vaginal smear patterns associated with proestrus, estrus, and metestrus are described. Data from 41 adults indicated estrus begins about 13 March and persists for 10 days.
J. J. Kennelly, B. E. Johns
openaire   +1 more source

Control of the Estrous Cycle in the Mare

Veterinary Clinics of North America: Equine Practice, 1988
All current approaches to manipulating the reproductive biology of the nonpregnant mare are discussed.
openaire   +2 more sources

Estrous Cycle Manipulation in Dogs

Veterinary Clinics of North America: Small Animal Practice, 2018
Since 1939, scientists have studied estrous cycle manipulation in dogs resulting in more articles published in this field that any other area of canine reproduction. Estrous cycle manipulation in dogs must be safe and reliable. Dopamine agonists, gonadotropin-releasing hormone agonists, and gonadotropins are hormones that have been used for estrus ...
openaire   +2 more sources

An Inhibitory Effect of Melatonin on the Estrous Phase of the Estrous Cycle of the Rodent

Endocrinology, 1964
Microgram doses of melatonin decrease the incidence of vaginal smears that demonstrate estrous phases in Sprague- Dawley rats and C3H/HeN mice. This property is not shared by the precursors of melatonin, serotonin and N-acetylserotonin, or its major metabolite, 6-hydroxymelatonin.
Chu, E W, Wurtman, R J, Axelrod, J
openaire   +2 more sources

Electroconvulsive shock and the estrous cycle in the rat

Behavioral Biology, 1978
The effects of electroconvulsive shock on the estrous cycle in the rat were investigated. Sixty animals, chosen on the basis of stability of estrus, were assigned randomly to one of four treatment conditions with the restriction that each condition contain 15 subjects.
J S, Milner, L F, Gilbert, M J, Prewett
openaire   +2 more sources

The Estrous Cycle

1985
The golden hamster Mesocricetus auratus was described as a new species and originally named Cricetus auratus by Waterhouse (1839). Laboratory colonies of the golden hamster both in Europe and America originate from a single capture from the wild by Mr. I.
openaire   +1 more source