This study was carried out to investigate the effect of different hormonal programs on the reproductive parameters and serum progesterone concentration of Lake-Ghashghaei ewes in spring season. In this study, 144 ewes were selected from two large nomadic herds. The ewes were synchronized using progesterone sponges. One day before harvesting the sponges, all ewes were injected intramuscularly with 400 IU of eCG. Then ewes were divided into six groups (12 ewes). In the first herd, 1 (GnRH-1 group), 2 (GnRH-2 group), 5 (GnRH-5 group), 7 (GnRH-7 group) and 12 days (GnRH-12 group) after estrus observation, 25.00 µg GnRH was injected intramuscularly to the ewes. In the second herd, the ewes were received 500 IU of hCG on days 1 (hCG-1), 2 (hCG-2), 5 (hCG-5), 7 (hCG-7) and 12 (hCG-12). In each herd, a group of 12 ewes received only eCG and progesterone sponges and was considered as control group. The results showed that twinning rate, the number of born lambs, fecundity and prolificacy rate were higher GnRH and hCG received groups on the second day compared to other groups. The serum progesterone concentration was significantly higher in all groups received GnRH and hCG compared to control group. In general, the results showed that GnRH and hCG two days after mating improved different reproductive activities in addition to increasing serum progesterone concentration. On the other hand, hCG had a greater effect on progesterone concentration, the number of born lambs and the fecundity rate compared to GnRH.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9840796 | PMC |
| http://dx.doi.org/10.30466/vrf.2021.527306.3158 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Cycle Effects Are Not Universal: A Case Study of Urinary C-Reactive Protein Concentrations in Rural Polish and Polish American Samples.
Am J Hum Biol
January 2025
Department of Anthropology, University of Illinois, Urbana-Champaign, Illinois, USA.
Objectives: We need to better understand how the menstrual cycle interacts with other biological systems, such the inflammation and immune response. One way to study this interaction is through C-reactive protein (CRP). Studies of CRP concentrations across the menstrual cycle have been inconsistent.
View Article and Find Full Text PDFRelationships between activity monitoring device data and ovarian, uterine, hormonal, and pregnancy variables in beef cows.
Theriogenology
January 2025
Department of Animal Sciences, University of Florida, Gainesville, FL, USA. Electronic address:
Implementing accelerometer technologies in beef operations is an alternative to increase precision in estrous detection. We hypothesized that (1) the accelerometer algorithm has similar accuracy in detecting behavioral estrus as does visual observation of pressure-sensitive sensors (estrus patches) in grazing beef cows; (2) variables measured by the accelerometer, such as estrus intensity, are associated with hormonal, ovarian, and uterine variables monitored before, during, and after estrus; and (3) the accelerometer variables are associated with the probability of pregnancy in grazing beef cows submitted to embryo transfer (ET). Fifty cows were fitted with accelerometer and patches to detect estrus after a synchronization protocol in eight subsequent rounds.
View Article and Find Full Text PDFRole of resistin in the porcine uterus: effects on endometrial steroidogenesis.
Reprod Fertil Dev
January 2025
Department of Animal Anatomy and Physiology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland.
Context The adipose tissue produces adipokines - hormones essential to many biological functions, including reproduction. Aims We hypothesised that resistin, one of the adipokines, is present in the blood plasma, uterine luminal flushings (ULF) and uterus of pigs during the oestrous cycle and early pregnancy, and that resistin influences uterine steroidogenesis. Methods This study aimed to determine the expression of resistin in the porcine endometrium and myometrium during the cycle and pregnancy by quantitative real-time polymerase chain reaction and western blot (WB).
View Article and Find Full Text PDFToward At-Home and Wearable Monitoring of Female Hormones: Emerging Nanotechnologies and Clinical Prospects.
ACS Sens
January 2025
School of Materials Science and Engineering, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou 510275, People's Republic of China.
Steroid hormones, especially progesterone (P), estradiol (E), and testosterone (T), are key bioactive regulators in various female physiological processes, including growth and development, ovulation, and the reproductive cycle, as well as metabolism and mental health. As lipophilic molecules produced in sex glands, these steroid female hormones can be transported through blood vessels into various body fluids such as saliva, sweat, and urine. However, the ultralow concentration of steroid hormones down to picomolar (pM) level necessitates great demands for ultrasensitive but low-cost analytic tools to implement accurate, point-of-care or even continuous monitoring in a user-friendly fashion.
View Article and Find Full Text PDFGnRH pulse generator activity in mouse models of polycystic ovary syndrome.
Elife
January 2025
Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, United Kingdom.
Article Synopsis
- One in ten women of reproductive age have PCOS, characterized by subfertility, high LH levels, and potential dysfunction in the kisspeptin neurons that regulate GnRH.
- Researchers studied the GnRH pulse generator in two mouse models of PCOS: the peripubertal androgen (PPA) model showed fewer synchronized neuron events, while the prenatal androgen (PNA) model revealed variable GnRH activity but cyclical patterns indicating complexity.
- Findings indicate that in the PNA model, ARN neurons had increased activity during specific stages and less sensitivity to progesterone, highlighting the need to understand GnRH regulation in PCOS-related conditions.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!