The biochemical composition of seminal plasma (SP) is very complex and variable among species. Advances in reproductive technologies reveal SP as a nutritive-protective medium for sperm cells suspended in it, and some SP components are very important for sperm metabolism, as well as sperm function, survival, and transport in the female reproductive tract. Biochemistry of SP is a relatively modern but rapidly expanding field of research, particularly concerning the biological significance of the various biochemical constituents of SP. However, identification of active factors in SP and mechanisms by which they act are not sufficiently understood in different species. Especially in camelids, the origin, composition, and function of the viscous component of SP remain a mystery, and only some biochemical and morphological characteristics of SP have been described. In this review, we focus on the current understanding of physiological and biochemical properties of SP in ruminants and camelids.
Anoestrus is considered as one of the most prevalent reproductive disorders in dairy cows and may occur due to hormonal imbalance, nutritional deficiency and disease conditions. Proper diagnosis and treatment are essential to overcome this disorder to make dairy herd profitable. Therefore, the aim of study was to determine effects of hormonal and nutritional treatments on induction of oestrus and conception in postpartum anoestrus cows. Effects of BCS and parity of anoestrus cows were also considered during treatment. Seventy two cross-breed cows having ≥60 days postpartum period were used, which were allotted for two treatment groups. Forty cows were treated with hormone (GnRH and PGF 2 ) and rest 32 cows were with nutritional supplement. AI was performed in cows in observed oestrus and the conception was determined by transrectal ultrasonography between 28-35 days post-Al. 75% cows showed oestrus in hormonal treatment groups whereas 56.3% cows in nutritional treatment group. Moreover, the conception rate was significantly (P<0.05) higher in cows (57.5%) received hormonal treatment compared to that of cows (40.6%) in nutritional treatment counterpart. Highest conception rate was also observed (69.2%) in GnRH treated cows having BCS 2-2.5. Cows with parity 1-3 responded better to treatment and had higher conception rate. These results suggest that diagnosis of ovarian activities and reproductive disorders with the help of ultrasonography can lead to use appropriate techniques for treatment as well as to improve reproductive efficiencies of cows in case of postpartum anoestrus.
The myiasis is very common surgical affections of ruminants in Bangladesh. There are limited researches on the maggot wound infestation in Bangladesh. A retrospective study was performed to collect data and to get a clear and genuine concept on myiasis affections in ruminants in respect to species. age, sex, breed, season and predilection sites. The present study was conducted in Veterinary Clinic, Bangladesh Agricultural University, Mymensingh and data was recorded from 2008 to 2012. Results showed that 151 animals were affected with myiasis and maggot wounds predominantly occurred in the cattle (71.6%) among which calves were more affected. Myiasis was very prone to occur in the navel, vulva, leg and ear. During the study period, more affection occurred in animals of below 6 months (41%). The females (66%) were more frequently affected than the males (34%) and cross breed (57%) was more affected compared to local breed (43%).Moreover, infestation frequently observed from March to June (80%). This study could help veterinarians as well as farmers to be aware of the occurrence of maggot wounds and to implement protective measures with minimum complications.
IntroductionThe ovarian follicular dynamics, vaginal electrical resistance (VER), progesterone (P4) and oestrogen (E2) profiles were investigated during the oestrous cycle in four indigenous ewes.Material and MethodsDaily VER values were recorded with a heat detector. The follicles were observed and measured by trans-rectal ultrasonography. Blood was collected daily for hormonal profiles.ResultsA significant variation in VER values (P < 0.05) in oestrus by ewes and position in the sequence of cycles was observed. Trans-rectal ultrasonography of ovaries revealed the presence of 2–4 waves of follicular growth. Study of hormonal profiles by ELISA revealed a positive correlation between E2 concentration and development of follicles and a negative correlation between P4 concentration and their development. The concentrations of oestradiol increased in oestrus and then decreased to a basal level. Follicular growth was accompanied by a rise in the concentration of serum oestradiol. Inversely, when follicles received the stimulation for ovulation, concentration of progesterone started to fall, but after ovulation, it climbed back to its peak and remained at this state until next ovulatory follicle reached its maximum diameter.ConclusionThis study could help to set up a manipulative reproductive technique for improving genetic values in indigenous sheep.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.