INTRODUCTION As a consequence of poor productivity caused by a long anoestrous period, considerable research effort has been given to oestrus induction in dogs to enhance the productivity of young dogs and to preserve breeds. MATERIALS AND METHODS Oestrus was induced in 30 anoestrous bitches more than three months after the last oestrus. Bitches orally received fermented rice punch with or wi...

Measurements every day or every other day showed that testosterone levels ranging from 15 to 70 pg/ml were higher at oestrus in 4 of the 6 mares studied. In these 4 mares, another testosterone peak occurred 11--13 days before the next oestrus either before (3 mares) or after the fall in progesterone levels.

1. Masoodi M, Hosseini K. The respiratory and allergic manifestations of human myiasis caused by larvae of the sheep bot fl y (Oestrus ovis): a report of 33 pharyngeal cases from southern Iran. Ann Trop Med Parasitol. 2003;97:75–81. 2. Fathy FM, El-Barghathi A, El-Ahwal A, El-Bagar S. Study on human ophthalmomyiasis externa caused by Oestrus ovis larva, in Sirte-Libya: parasite features, clinic...

BACKGROUND Declining fertility is a major concern for dairy farmers today. One explanation is shorter and weaker expression of oestrus in dairy cows making it difficult to determine optimal time for artificial insemination (AI). Chemical communication is of interest in the search for tools to detect oestrus or to synchronise or enhance oestrous periods. Pheromones, used in chemical communicatio...

Recordings of electrical activity of the oviduct and uterus were obtained during three oestrous cycles in cows fitted with an extra-cellular multi-electrode assembly. The stages of the cycle were identified by the appearance of the cervico-vaginal secretions and changes in the peripheral plasma level of progesterone were determined by radioimmunoassay. A gradual transition from local non-propag...

This study predicts the magnitude and between herd variation in changes of methane emissions and production efficiency associated with interventions to improve reproductive efficiency in dairy cows. Data for 10,000 herds of 200 cows were simulated. Probability of conception was predicted daily from the start of the study (parturition) for each cow up to day 300 of lactation. Four scenarios of d...

Effective reproductive management is a crucial concern in the dairy industry and missed oestrus and late recognition of unsuccessful insemination can lead to substantial financial loss. Progesterone levels change in a predictable manner with progress of the oestrus cycle and with the onset of pregnancy. We report here the development of a simple ELISA test for the measurement of progesterone le...

The aim of the present study was to determine the responses of Black Bengal Goat following synchronization with alfaprostol, superovulation with PMSG and embryo collection with surgical procedure. This research work was carried out at the Department of Surgery and Obstetrics, Bangladesh Agricultural University (BAU) during the period from January to December 2001. Three Flushing schedules have ...

Plasma concentrations of LH, progesterone and oestradiol were measured in 5 cyclic swamp buffaloes. Progesterone levels began to increase after Day 5 (Day 0 = the day of oestrus) and reached a plateau after Day 10. A rapid decrease in progesterone levels occurred during the 5 days before oestrus, followed by a sustained increase in oestradiol concentrations. Basal LH levels decreased towards th...

The serum levels of lh were measured by radioimmunoassay in androgen-sterilized and normal cyclic rats, both in the presence and absence of ovaries. The serum of persistent-oestrous rats contained significantly more lh than that of normal rats on the day of oestrus, the raised level being comparable to that found in the adult male rat. The pituitary gland of the persistent-oestrus rat resembled...