Brunner, Donaldson & Hansel (1969) showed that ACTH suppressed corpus luteum formation when administered during Days 2 to 8 of the bovine oestrous cycle. We found that adrenal suppression by betamethasone treatment from Day 10 increased the length of the bovine oestrous cycle: plasma concentrations of oestradiol and androstenedione were unaltered but testosterone levels were reduced by 13 % (Ka...

KŘIVÁNEK, I.: Impedance pattern of vaginal and vestibular mucosa in cyclic goats. Acta univ. agric. et silvic. Mendel. Brun., 2008, LVI, No. 4, pp. 109–114 The changes of vaginal and vestibular impedance during the oestrous cycle in goats were examined. The onset of oestrus was teased with a buck once a day during the experiment. Impedance was measured by a four-terminal method. The vaginal imp...

The aim of this study was to compare morphological and functional features of spontaneous and induced corpora lutea (CLs) in goats. Fourteen adult and cycling Anglo Nubian goats (Argentina) were randomly allocated to two groups: Group N (n=7) included goats with natural spontaneous oestrus and Group PG (n=7) included does in which oestrus was synchronized by the administration of two i.m. clopr...

bassia latifolia bud and cajanus cajan seed were evaluated for anti-fertility activity in mature female mice. anti-fertility activity was evaluated by observing the estrus cycle, body weight, wet weight of ovaries, steroidogenic enzymes, and substrates. bassia latifolia bud and cajanus cajan seed extract arrested normal oestrous cycle at dioestrous stage. the decrease in weight of ovary and ute...

In this study, genital tracts of 20 healthy non-pregnant buffaloes were collected from Urmia abattoir.These genital tracts were selected based on their ovaries conditions, half of them were in follicular phase and the other half were in luteal phase. The samples were taken from anterior, middle and posterior regions of the cervix and fixed in 10% buffer formalin. Then, histological sections of ...

The new methods of different administration times for the treatment of primary dysmenorrhea are more widely used clinically; however, no obvious mechanism has been reported. Therefore, an animal model which is closer to clinical evaluation is indispensable. A novel animal experiment with different administration times, based on the mice oestrous cycle, for primary dysmenorrhoea treatment was ex...

Anterior pituitary gland fragments removed from female rats at various days of the oestrous cycle were perifused into small Biogel columns. After 2 hours stabilisation, the tissues were exposed at the beginning of each of five hours of perifusion to a volley of six 1-mi pulses of LHRH (10M1 8, given 4 min.apart. Pituitary glands removed during oestrus or met-oestrus showed little change in the ...

Sex-differences and changes during the oestrous cycle were quantitatively studied by electron microscopy in the mouse anterior pituitary. Sex-difference: The population of STH-cells and gonadotrophs showed a higher value in males than in females, while that of LTH-cells was lower in males. The population of TSHand ACTH-cells was a little higher in males. Chromophobes revealed no sex-difference ...

Samples and data were collected from twenty-eight female black rhinoceroses (Diceros bicornis) during translocation efforts carried out by the Department of National Parks and Wildlife Management in Zimbabwe. Biological data were collected, cytological examination of vaginal smears was performed, and serum concentrations of follicle stimulating hormone, luteinizing hormone, progesterone, oestri...

Although both males and females become addicted to cocaine, females transition to addiction faster and experience greater difficulties remaining abstinent. We demonstrate an oestrous cycle-dependent mechanism controlling increased cocaine reward in females. During oestrus, ventral tegmental area (VTA) dopamine neuron activity is enhanced and drives post translational modifications at the dopami...