Beenish  Shahid, Muhammad  Ijaz Khan, Syed  Murtaza Hassan Andrabi, Muhammad  Nasim Khan, Shafiq  Haider, Mujahid  Hussain, Muhammad  Shahzad, Abdul  Razzaq, 
    Development of Fixed-Time Artificial Insemination Through Luteinizing Hormone Peak,
Plasma Progesterone and Follicular Dynamics in Locally Adopted <i>Bos indicus</i> Cow of Azad
Jammu and Kashmir,
    Journal of Animal and Veterinary Advances,
    Volume 19,Issue 6,
    2020,
    Pages 82-91,
    ISSN 1680-5593,
    javaa.2020.82.91,
    (https://makhillpublications.co/view-article.php?doi=javaa.2020.82.91)
    Abstract: The experiments were conducted aiming to
evaluate the effect of three estrus synchronization
protocols viz. Ovsynch, CIDR and CO-Synch+CIDR on
LH Peak, Plasma P4 and follicular dynamics in a fixedtime
AI (FTAI) in locally adopted non-descript
indigenous cows. The blood samples were collected at
2 h intervals, starting at 12-108 h from post PGF2&#945; to
determine the LH surge and for P4 on day 0, 4, 7, 11 and
then once weekly for 8 weeks of estrus synchronization
and FTAI. A better synchrononyof LH peak was observed
in Ovsynch group (48.40&plusmn;0.40 h post PGF<sub>2&#945;</sub>)
compared to CIDR (71.67&plusmn;9.74 h) and CO-Synch+CIDR
(54.86&plusmn;4.71 h) protocols. The mean follicular diameter,
daily growth rate and ovulation rate did not differ
(p>0.05) among three groups. The interval between PGF<sub>2&#945;</sub>
and ovulation was lower (p>0.05) in Ovsynch group when
compared to CIDR and CO-Synch+CIDR groups. The
conception rate at first service (80%) in Ovsynch group
was significantly higher (p<0.05) compared to CIDR and
CO-Synch+CIDR groups. It is concluded that the time of
LH peak in synchronized estrus of non-descript
indigenous cows is simsilar to taht in <i>Bos
Tauruscows</i> and Ovsynch protocol induced the best
synchrony of pre-ovulatory LH surge and ovulation.
    Keywords: Estrus synchronization;Ovsynch;CIDR;LH surge;progesterone;non-descript cows