| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
Department of Animal Sciences and Industry, Kansas State University, Manhattan 66506-0201
Corresponding author: J. S. Stevenson; e-mail: jss{at}ksu.edu.
Two experiments examined pregnancy after synchronized ovulation (Ovsynch) with or without progesterone (P4) administered via controlled internal drug release (CIDR) intravaginal inserts. In experiment 1, 262 lactating cows in one herd were in 3 treatments: Ovsynch (n = 91), Ovsynch + CIDR (n = 91), and control (n = 80). The Ovsynch protocol included injections of GnRH 7 d before and 48 h after an injection of PGF2
. Timed artificial insemination (TAI; 57 to 77 d postpartum) was 16 to 20 h after the second GnRH injection. Cows in the Ovsynch + CIDR group also received a CIDR (1.9 g of P4) insert for 7 d starting at first GnRH injection. Control cows received A-I when estrus was detected using an electronic estrus detection system. Based on serum P4, 44.1% of cows were cyclic before Ovsynch. Pregnancy rates at 29 d (59.3 vs. 36.3%) and 57 d (45.1 vs. 19.8%) after TAI and embryo survival (75.9 vs. 54.5%) from 29 to 57 d were greater for Ovsynch + CIDR than for Ovsynch alone. In experiment 2, 630 cows in 2 herds received TAI at 59 to 79 d postpartum after 6 treatments. Estrous cycles were either presynchronized (2 injections of PGF2 14 d apart; n = 318) or not presynchronized (n = 312). Within those groups, Ovsynch was initiated 12 d after second presynchronization PGF2 and used alone (n = 318) or with CIDR inserts for 7 d (1.38 g of P4/insert, n = 124 or 1.9 g of P4/insert, n = 188). Before Ovsynch, 80% of cows were cyclic. Presynchronization increased pregnancy (46.8 vs. 37.5%) at 29 d after TAI, but CIDR inserts had no effect on pregnancy in experiment 2. Overall embryonic survival between 29 and 57 d in experiment 2 was 57.7%. Use of CIDR inserts with Ovsynch improved conception and embryo survival in experiment 1 but not in experiment 2, in part due to differing proportions of cyclic cows at the outset. Presynchronization before Ovsynch enhanced pregnancy rate.
Key Words: progesterone • Ovsynch • dairy cow • pregnancy rate
Abbreviation key: CIDR = controlled internal drug-releasing intravaginal insert containing either 1.38 (CIDR-1.38) or 1.9 g of progesterone (CIDR-1.9), CL = corpus luteum, ECM = energy-corrected milk, High P4 = concentrations of progesterone in blood serum 
1 ng/mL, Low P4 = concentrations of progesterone in blood serum < 1 ng/mL, Ovsynch = injection of GnRH 7 d before and 48 h after an injection of PGF2 with timed AI at 16 to 20 h after the second GnRH injection, Ovsynch + CIDR = same as Ovsynch plus a CIDR insert for 7 d at the time of first GnRH injection, P4 = progesterone, Presynch = presynchronization—2 injections of PGF2 14 d apart with the second injection given 12 d before initiating Ovsynch, PRID = progesterone-releasing intravaginal device, TAI = timed AI
This article has been cited by other articles:
|
|
 |
|
  J. L. Stevenson, J. A. Rodrigues, F. A. Braga, S. Bitente, J. C. Dalton, J. E. P. Santos, and R. C. Chebel Effect of Breeding Protocols and Reproductive Tract Score on Reproductive Performance of Dairy Heifers and Economic Outcome of Breeding Programs J Dairy Sci, September 1, 2008; 91(9): 3424 - 3438. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 N. R. Leitman, D. C. Busch, J. F. Bader, D. A. Mallory, D. J. Wilson, M. C. Lucy, M. R. Ellersieck, M. F. Smith, and D. J. Patterson Comparison of protocols to synchronize estrus and ovulation in estrous-cycling and prepubertal beef heifers J Anim Sci, August 1, 2008; 86(8): 1808 - 1818. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. J. Ambrose, D. G. V. Emmanuel, M. G. Colazo, and J. P. Kastelic Short Communication: Pregnancy Rates to Timed Artificial Insemination in Holstein Heifers Given Prostaglandin F2{alpha} Twenty-Four Hours Before or Concurrent with Removal of an Intravaginal Progesterone-Releasing Insert J Dairy Sci, July 1, 2008; 91(7): 2678 - 2683. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. S. Stevenson, D. E. Tenhouse, R. L. Krisher, G. C. Lamb, J. E. Larson, C. R. Dahlen, J. R. Pursley, N. M. Bello, P. M. Fricke, M. C. Wiltbank, et al. Detection of Anovulation by Heatmount Detectors and Transrectal Ultrasonography Before Treatment with Progesterone in a Timed Insemination Protocol J Dairy Sci, July 1, 2008; 91(7): 2901 - 2915. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. Silva, R. A. Sterry, D. Kolb, M. C. Wiltbank, and P. M. Fricke Effect of Pretreatment with Prostaglandin F2{alpha} Before Resynchronization of Ovulation on Fertility of Lactating Dairy Cows J Dairy Sci, December 1, 2007; 90(12): 5509 - 5517. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. S. Stevenson, M. A. Portaluppi, and D. E. Tenhouse Factors Influencing Upfront Single-and Multiple-Ovulation Incidence, Progesterone, and Luteolysis Before a Timed Insemination Resynchronization Protocol J Dairy Sci, December 1, 2007; 90(12): 5542 - 5551. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. Silva, R. A. Sterry, and P. M. Fricke Assessment of a Practical Method for Identifying Anovular Dairy Cows Synchronized for First Postpartum Timed Artificial Insemination J Dairy Sci, July 1, 2007; 90(7): 3255 - 3262. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. B. Walsh, S. J. LeBlanc, T. D. Duffield, D. F. Kelton, J. S. Walton, and K. E. Leslie Synchronization of Estrus and Pregnancy Risk in Anestrous Dairy Cows After Treatment with a Progesterone-Releasing Intravaginal Device J Dairy Sci, March 1, 2007; 90(3): 1139 - 1148. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. Melendez, G. Gonzalez, E. Aguilar, O. Loera, C. Risco, and L. F. Archbald Comparison of Two Estrus-Synchronization Protocols and Timed Artificial Insemination in Dairy Cattle J Dairy Sci, December 1, 2006; 89(12): 4567 - 4572. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. Z. Caraviello, K. A. Weigel, P. M. Fricke, M. C. Wiltbank, M. J. Florent, N. B. Cook, K. V. Nordlund, N. R. Zwald, and C. L. Rawson Survey of Management Practices on Reproductive Performance of Dairy Cattle on Large US Commercial Farms J Dairy Sci, December 1, 2006; 89(12): 4723 - 4735. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. C. Chebel, J. E. P. Santos, R. L. A. Cerri, H. M. Rutigliano, and R. G. S. Bruno Reproduction in dairy cows following progesterone insert presynchronization and resynchronization protocols. J Dairy Sci, November 1, 2006; 89(11): 4205 - 4219. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. C. Lamb, J. E. Larson, T. W. Geary, J. S. Stevenson, S. K. Johnson, M. L. Day, R. P. Ansotegui, D. J. Kesler, J. M. DeJarnette, and D. G. Landblom Synchronization of estrus and artificial insemination in replacement beef heifers using gonadotropin-releasing hormone, prostaglandin F2{alpha}, and progesterone J Anim Sci, November 1, 2006; 84(11): 3000 - 3009. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. S. Stevenson, J. R. Pursley, H. A. Garverick, P. M. Fricke, D. J. Kesler, J. S. Ottobre, and M. C. Wiltbank Treatment of cycling and noncycling lactating dairy cows with progesterone during Ovsynch. J Dairy Sci, July 1, 2006; 89(7): 2567 - 2578. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. Flores, M. L. Looper, D. L. Kreider, N. M. Post, and C. F. Rosenkrans Jr. Estrous behavior and initiation of estrous cycles in postpartum Brahman-influenced cows after treatment with progesterone and prostaglandin F2{alpha} J Anim Sci, July 1, 2006; 84(7): 1916 - 1925. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. A. Sterry, M. L. Welle, and P. M. Fricke Effect of interval from timed artificial insemination to initiation of resynchronization of ovulation on fertility of lactating dairy cows. J Dairy Sci, June 1, 2006; 89(6): 2099 - 2109. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. C. Dalton, R. Manzo, A. Ahmadzadeh, B. Shafii, W. J. Price, and J. M. DeJarnette Short Communication: Conception Rates Following Detection of Estrus and Timed AI in Dairy Cows Synchronized Using GnRH and PGF2{alpha} J Dairy Sci, December 1, 2005; 88(12): 4313 - 4316. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. A. Portaluppi and J. S. Stevenson Pregnancy Rates in Lactating Dairy Cows After Presynchronization of Estrous Cycles and Variations of the Ovsynch Protocol J Dairy Sci, March 1, 2005; 88(3): 914 - 921. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. S. Stevenson and A. P. Phatak Inseminations at Estrus Induced by Presynchronization Before Application of Synchronized Estrus and Ovulation J Dairy Sci, January 1, 2005; 88(1): 399 - 405. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. N. Galvao, J. E. P. Santos, S. O. Juchem, R. L. A. Cerri, A. C. Coscioni, and M. Villasenor Effect of addition of a progesterone intravaginal insert to a timed insemination protocol using estradiol cypionate on ovulation rate, pregnancy rate, and late embryonic loss in lactating dairy cows J Anim Sci, December 1, 2004; 82(12): 3508 - 3517. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. S. Stevenson and S. M. Tiffany Resynchronizing Estrus and Ovulation After Not-Pregnant Diagnosis and Various Ovarian States Including Cysts J Dairy Sci, November 1, 2004; 87(11): 3658 - 3664. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. S. Stevenson, S. M. Tiffany, and M. C. Lucy Use of Estradiol Cypionate as a Substitute for GnRH in Protocols for Synchronizing Ovulation in Dairy Cattle J Dairy Sci, October 1, 2004; 87(10): 3298 - 3305. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. Z. El-Zarkouny and J. S. Stevenson Resynchronizing Estrus with Progesterone or Progesterone Plus Estrogen in Cows of Unknown Pregnancy Status J Dairy Sci, October 1, 2004; 87(10): 3306 - 3321. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
