The present study was conducted to investigate the attributes of ram sexual behaviour under different social conditions. Six intact rams and eight overiectomized ewes were used in this experiment. Ewes were artificially brought into oestrus. All mating traits were recorded every 10 sec during a 1 h mating session under five social conditions viz., ram exposed to single oestrus ewe, ram exposed ...

To determine the change in distribution of ewes exhibiting oestrus at the first and second oestrous cycles after progestagen treatment, data were examined from six experiments in which 430 ewes received progestagens but experienced no fertile mating at the first post-treatment oestrus. Three progestagens, three breeds and two seasons were involved. In all experiments there were more silent heat...

Efficient oestrus detection is important economically, particularly with seasonal-calving herds employing artificial insemination, as every missed oestrus effectively costs 21 days milk production for that cow in that season which is about 8% of the total. Traditionally, oestrus detection relies mainly on visual observation of animal behaviour a cow in oestrus will stand and allow herself to be...

The distribution of sialic acid residues as well as other glycosidic sugars has been investigated in the horse oviductal isthmus during anoestrus, oestrus and pregnancy by means of lectin and pre-lectin methods. Ciliated cells and non-ciliated (secretory) cells exhibited different lectin binding profiles that were found to change during the investigated stages. Ciliated cells did not show any r...

Progesterone action is mediated by its binding to specific receptors. Two progesterone receptor (PR) isoforms (PRA and PRB), three membrane progesterone receptor (mPR) subtypes (mPRalpha, mPRbeta and mPRgamma) and at least one progesterone membrane-binding protein [PR membrane component 1 (PRmc1)] have been identified in reproductive tissues and brain of various species. In the present study, w...

Rats ovulate during the 1st or 2nd night following parturition (Hoffman & Schwartz, 1965). Subsequently, oestrus is not usually observed during lactation. After weaning, cycling is resumed and only then can oestrus be discerned (Long & Evans, 1922). The possibility of studying the relation between lactation and fertility is, therefore, conditional on effective mating of the females at the post-...

a study on clinical signs of tuberculosis patients in urmia a gholami , bsc l moosavi jahromi ,bsc received: 11 aug, 2009 accepted: 25 oct, 2009 abstract background & aims: tuberculosis is a major health problem worldwide, especially in developing countries. the warning signs of pulmonary tuberculosis are chronic cough with sputum that is usually accompanied by bloody sputum, and sometimes the ...

Background & Aims: Giardiasis is one of the human parasitic diseases caused by a flagellate protozoan named Giardia duodenalis (G.lamblia). Giardia is one of the most common organisms causing diarrhea in human and also a common gastrointestinal parasite in vertebrates. Methods: A total of 352 stool samples were collected from patients infected with giardiasis referred to health centers in K...

Experimental control of fertility has been accomplished by inserting foreign objects in the uterus. Doyle & Margolis (1963) found that a suture in the uterine lumen of the rat prevented implantation of blastocysts. This was soon followed by similar studies on the rabbit (Adams & Eckstein, 1964), cow (Hawk, Conley, Brinsfield & Righter, 1965) and ewe (Hawk, 1965). A local inhibitory effect on lu...

American black bears (Ursus americanus) are seasonally polyoestrous and exhibit delayed implantation, which may allow equal and independent fertility of recurrent oestruses of a mating season. We postulated that the luteal inactivity during delayed implantation allows bears to have sequential ovulation during a polyoestrous mating season such that each oestrus of a polyoestrous female will have...