Results 31 to 40 of about 3,996 (257)
Veterinary Medicine and Science, Volume 9, Issue 3, Page 1338-1348, May 2023., 2023 We hypothesized that a faster transition (14 versus 21 days) from a fresh‐cow diet (higher forage:concentrate) to a lactation diet (lower forage:concentrate), combined by a greater glucose supply at the intestinal level during the fresh period will have a positive long‐term effect on productivity of high‐producing Holsteins.
H. Beiranvand +3 more
wiley +1 more source
Reproduction in Domestic Animals, Volume 58, Issue 4, Page 529-536, April 2023., 2023 Abstract The objectives of this study were to compare oestrous synchronization expression and conception rate following timed artificial insemination (TAI) with frozen–thawed X‐sexed or unsexed semen in dairy and beef cows. For this study, 227 cows (dairy, n = 130 and beef, n = 97) were assigned to a 9‐day Ovsynch + controlled intravaginal drug release
Thabang Luther Magopa +2 more
wiley +1 more source
Veterinary Medicine and Science, Volume 9, Issue 2, Page 974-981, March 2023., 2023 The purpose of this study is to improve the fertility rate by ovulation delay caused by foot‐and‐mouth disease vaccination. We figure out that ovulation delay can be employed to improve conception rate after FMD vaccination through a modified ovulation synchronization method with 500 μg of GnRH administration.
Daehyun Kim +7 more
wiley +1 more source
Ultrasonographic patterns of different regions of uterus according to pregnancy in cows and heifers
Animal Science Journal, Volume 94, Issue 1, January/December 2023., 2023 Abstract This study aimed to detect pregnancy within the first 20 days after artificial insemination by evaluating the ultrasonographic patterns of the different regions of uterus in Holstein heifers and cows. Animals were divided into subgroups according to pregnancy on 28th day as pregnant (heifer, n: 15; cow, n: 15) and non‐pregnant (heifer, n: 15 ...
Kemal Tuna Olğaç +3 more
wiley +1 more source
Australian Veterinary Journal, Volume 100, Issue 10, Page 479-491, October 2022., 2022 Objective This study investigated the effects of administering saline, 100 or 250 μg of gonadotrophin releasing hormone (GnRH) on ovarian response, synchrony of oestrus and ovulation and chronic stress response in Bos indicus cattle. Design Randomised control.
M Abdallah +4 more
wiley +1 more source
Effect of progestagen application during ovsynch protocol on pregnancy rates of lactating-grazing cows [PDF]
Kafkas Universitesi Veteriner Fakültesi Dergisi, 2017 The aim of this study was to test the effect of progesterone supplementation to Ovsynch protocol in lactating and grazing cows on pregnancy rate after fixed time artificial insemination (TAI).
ARI UÇ +6 more
doaj +1 more source
Current status of assisted reproductive technologies in buffaloes
Animal Science Journal, Volume 93, Issue 1, January/December 2022., 2022 Abstract Buffaloes are raised by small farm holders primarily as source of draft power owing to its resistance to hot climate, disease, and stress conditions. Over the years, transformation of these animals from draft to dairy was deliberately carried out through genetic improvement program leading to the development of buffalo‐based enterprises ...
Kanokwan Srirattana +9 more
wiley +1 more source
Comparison of synchronisation and fertility after different modifications of the ovsynch protocol in cyclic dairy cows [PDF]
, 2013 The objectives of this study were to evaluate the effects of (1) double doses of PGF2α administration or (2) an exogenous progesterone (CIDR) applied concurrently with, or (3) the day after, first GnRH of Ovsynch (GnRH-1), on synchronisation and ...
Gumen, Ahmet +5 more
core +1 more source
Reproduction in Domestic Animals, Volume 56, Issue 12, Page 1511-1518, December 2021., 2021 Abstract The objective of this project was to report the effects of season and age on conception rate amongst Italian Mediterranean Buffalo subjected to an Ovsynch/Resynch (O/R) reproductive management protocol. The study utilized nulliparous (heifers), primiparous buffalo cows (PBC) and multiparous buffalo cows (MBC).
Gabriel Otava +7 more
wiley +1 more source
Veterinary Medicine and Science, Volume 7, Issue 1, Page 148-155, January 2021., 2021 The administration of prostaglandin and hCG in combination with the ram effect may reduce lambing period and tended to increase lambing rate at the first cycle during the non‐breeding season. Administrations of double injection of GnRH not only had no effect on the progesterone concentrations but also couldn’t improve the reproductive performance of ...
Mohammad Ayaseh +3 more
wiley +1 more source