rams once every 4 hr was shorter when ewes and rams remained together than when they were kept apart between observations. Continuous contact with rams appeared to limit the duration ofoestrus by inhibiting the neural mechanism controlling the expression of oestrous behaviour. Second, the duration of oestrus measured by teasing ewes individually every 4 hr and keeping them with rams between obs...

The experiments were designed to test the possibility to induce a down-regulation of pituitary GnRH-receptors and hence a suppression of oestrus by application of a long term deslorelin implant in female rats. Sixteen non pregnant female rats were randomly divided into two equal groups. The eight rats of the implant group (DESL) were subcutaneously implanted with long acting deslorelin implant,...

IntrodUl .. :tion Human ophLhalmomyiasis due to infestation with the larvae of the sbeep nasal bot fl y Oestrus ovi.\· has beeo known for 70 ye_ars l and the parasite is widely distributed in the Mediterranean , Russia , lndia, South Afri ca, Canada and th e USA. There has been no report of cases from Cyprus in spite of many cases occurring each year am ong the local community. Three ~ases of O...

To be ultimately successful, techniques used to control the oestrous cycle of the cow will have to embody methods which allow the time of insemination to be arranged without reference to behavioural oestrus. This is particularly important in the case ofbeefsuckler cows as it is difficult to detect heat in these animals probably owing to the suckling stimulus. This means that treatments used to ...

Glycerylphosphorylcholine (GPO) diesterase activity and protein concentration in the rinsings of the rat uterus were greater during pro-oestrus and oestrus than at metoestrus or dioestrus. Oestradiol-3, 17~ significantly stimulated the secretion of this enzyme in ovariectomized rats and maximum levels of activity were observed 24-36 hr after a single injection of the oestrogen. The protein cont...

The aim of this study was to characterise the follicular dynamics in first two oestrous cycles peripubertal Malabari goats. Transrectal ultrasonography carried out on alternate days after observed oestrus. Follicular studies revealed presence five wave with predominant three and four patterns. interwave interval for ovulatory longer than preceding waves cycles. diameter largest follicles 1 larg...