No published information are available on the reproductive indices of local Abadeh does reared innorthern Fars province, southern Iran. This study was conducted to determine the duration of the breedingseason, and the length and duration of the oestrous cycle. Twenty single parity 2-year-old does from Abadeh(weighing 19–26 kg) were purchased and transferred to the School of Veterinary Medicine ...

The aim of this study was the evaluation of the relationship between values of selected biochemical blood parameters at the moment of cloprostenol (PGF2α) administration and the effectiveness of oestrus induction and fertility indices in dairy cows. Examinations were conducted on 121 cows with the corpus luteum between 45 and 120 d post calving. These animals were injected with 500 μg/cow of PG...

Bitches exhibited a characteristic arborization pattern of the fluid from the anterior vagina during pro-oestrus and oestrus. These changes were monitored together with conventional vaginal cytology and plasma oestrogen and progestagen concentrations. A classical ferning pattern, similar to that seen in bovine cervical mucus at oestrus, occurred after the peak in plasma oestrogen concentrations...

If preconditioned by a period of isolation from rams during the non-breeding season, ewes of many breeds respond to the reintroduction of rams (teasing) by displaying a relatively synchronised oestrus, approximately one oestrous cycle later (Merino: Schinckel 1954a; Awassi: Eyal 1958; Romney: Edgar and Bilkey 1963; Merinos d'Arles: Prud'hon et al. 1966). The oestrous activity of the flock is sp...

The aim of present study was to study the effect of post-ovulatory insemination on the subsequent embryonic loss, oestrous cycle length and vaginal discharge in sows. Ten Large White multiparous sows were divided into two groups. Group A sows were inseminated once at 15 h after ovulation. Thereafter, they were ovariohysterectomized on day 11 (n = 5, first day of standing oestrus = day 1) and fl...

A study of the duration oestrus and estrous cycles in mares from Haflinger breed (HB) influence some factors was conducted. The records used for this were breeding registers State Stud farm Kabiuk near Shumen, covering a period 11 years (2009 to 2020). In included 15 with 110 estruses 22 cycles. With breed, average is 5.52 ± 0.26 days length cycle 24.21 1.13 days. year (P<0.001), month season (...

This study investigated the hypothesis that a reduction in submission rates at a resynchronised oestrus is not due to the resynchrony treatment involving intravaginal progesterone releasing devices (IVDs) and oestradiol benzoate (ODB) but is associated with artificial insemination (AI) at the first synchronised oestrus. In Experiment 1, cows were synchronised for first oestrus with IVDs, with O...

BACKGROUND Application of assisted reproductive technologies in buffaloes is limited to some extent by farmers' inability to detect oestrus because of its poor expression. The present study aimed at investigating reliability of a milk progesterone enzyme-linked immunosorbent assay (ELISA) to assess the ovarian cyclicity during post partum, oestrus and post-breeding periods in water buffaloes. ...

Effect of free gossypol present in the cottonseed cakes was investigated using 12, Nili-Ravi dairy buffaloes randomly assigned to two equal groups i.e., A and B. Buffaloes in group. A were fed control ration and buffaloes in group B were fed cottonseed cake ration containing 5.88g free gossypol. Non­ significant differences were found between control and treated buffaloes in respect of occurren...

The pregnancy rate resulting from matings at a single oestrus in beef cattle averages 70% for natural mating (Turman, Laster, Renbarger & Stephens, 1971) and 60% for artificial insemination (Laster, Glimp & Gregory, 1972). The sources and causes of low pregnancy rates have not been defined, but might include variation in time of ovulation relative to deposition of spermatozoa in the female repr...