scholarly journals Low progesterone concentration during the development of the first follicular wave reduces pregnancy per insemination of lactating dairy cows

2012 ◽  
Vol 95 (4) ◽  
pp. 1794-1806 ◽  
Author(s):  
A.C. Denicol ◽  
G. Lopes ◽  
L.G.D. Mendonça ◽  
F.A. Rivera ◽  
F. Guagnini ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Progesterone Concentration ◽  
Follicular Wave ◽  
Lactating Dairy Cows

scholarly journals Reduced progesterone concentration during growth of the first follicular wave affects embryo quality but has no effect on embryo survival post transfer in lactating dairy cows

Reproduction ◽  
2011 ◽  
Vol 141 (3) ◽  
pp. 333-342 ◽  
Author(s):  
Fernando A Rivera ◽  
Luís G D Mendonça ◽  
Gláucio Lopes ◽  
José E P Santos ◽  
Rolando V Perez ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Estrous Cycle ◽  
Embryo Quality ◽  
Post Partum ◽  
Embryo Survival ◽  
Follicular Wave ◽  
Lactating Dairy Cows ◽  
Prostaglandin F ◽  
Donor Cows

Fertility of lactating dairy cows is associated with reduced progesterone (P4) concentration compared with nonlactating animals. The objective of the current study was to determine whether P4 during growth of the first follicular wave (FFW) affects embryo quality. Lactating Holstein cows at 33±3 days post partum were allocated to one of three treatments. Cows in the FFW and FFW with P4 (FFWP) treatments started the superstimulation protocol on day 1 of the estrous cycle and second follicular wave (SFW) cows started the superstimulation protocol on estrous cycle day 7. Cows were superstimulated with 400 mg of NIH-FSH-P1 (FSH) given twice daily for 5 days, two prostaglandin F2α (PGF2α) injections given with the ninth and tenth injections of FSH, GNRH given 48 h after the first PGF2α injection, and timed insemination 12 and 24 h after the GNRH injection. Cows in the FFWP treatment received two intravaginal P4 inserts during the superstimulation. Embryos were recovered 6.5 days after artificial insemination and excellent/good and fair embryos were frozen and transferred. Blood was sampled daily from estrous cycle day 0 until insemination from donor cows. During the superstimulation protocol, P4 was (P<0.01) greatest for SFW cows followed by FFWP and FFW cows respectively. The percentage of embryos–oocytes from SFW and FFWP cows classified as excellent/good and fair embryos was (P=0.02) greater than those of FFW cows. Pregnancy per embryo transfer was not (P≥0.73) affected by embryo donor treatment. Reduced embryo quality of cows induced to ovulate the follicles from the first follicular wave is a consequence of reduced P4 during follicle growth.

The Effect of Luteolysis at d 5, 6, or 7 of a GnRH-Induced Second Follicular Wave on Peak Serum Estradiol-17beta Concentrations in Lactating Dairy Cows.

2009 ◽  
Vol 81 (Suppl_1) ◽  
pp. 543-543
Author(s):  
Rachel K. Policelli ◽  
Joao Paulo N. Martins ◽  
Nora M. Bello ◽  
J. Richard Pursley
Keyword(s):  
Dairy Cows ◽  
Peak Serum ◽  
Serum Estradiol ◽  
Follicular Wave ◽  
Lactating Dairy Cows

Effect of Progesterone Concentration During Follicle Development on Subsequent Ovulation, Fertilization, and Early Embryo Development in Lactating Dairy Cows.

2011 ◽  
Vol 85 (Suppl_1) ◽  
pp. 685-685 ◽  
Author(s):  
Milo C. Wiltbank ◽  
Paulo D. Carvalho ◽  
Abdulkadir Kaskin ◽  
Katherine Suzanne Hackbart ◽  
Murillo A. Meschiatti ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Embryo Development ◽  
Early Embryo ◽  
Follicle Development ◽  
Progesterone Concentration ◽  
Early Embryo Development ◽  
Lactating Dairy Cows

235 FOLLICULAR WAVE EMERGENCE AND DEVELOPMENT FOLLOWING ESTRADIOL PLUS PROGESTERONE AT A GROWING OR A STATIC PHASE OF THE DOMINANT FOLLICLE IN CIDR-TREATED, LACTATING DAIRY COWS

2006 ◽  
Vol 18 (2) ◽  
pp. 225
Author(s):  
U. H. Kim ◽  
G. H. Suh ◽  
I. H. Kim
Keyword(s):  
Dairy Cows ◽  
Estradiol Benzoate ◽  
Control Group ◽  
Corpora Lutea ◽  
Dominant Follicle ◽  
Exact Test ◽  
Follicular Wave ◽  
Lactating Dairy Cows ◽  
Array Transducer ◽  
Static Phase

Treatment with estradiol benzoate (EB), compared to GnRH, in a controlled internal drug release (CIDR)-based timed AI protocol induced relatively asynchronous follicular wave emergence, resulting in ovulation of smaller ovulating follicles (Kim et al. 2005 Theriogenology 63, 260-268). In this study, we compared new follicular wave emergence and development following treatment with EB (2 mg) plus progesterone (50 mg) at a growing (Day 3 after ovulation) or a static (Day 8) phase of the dominant follicle during the first follicular wave in CIDR-treated, lactating dairy cows. Previously synchronized, lactating dairy cows received CIDRs (InterAg, Hamilton, New Zealand; Day 0) 3 days after ovulation and were assigned to two treatment groups and a control group. Cows in the T1 group (n = 11) received 2 mg EB (SY Esrone; Samyang, Seoul, Korea) and 50 mg P4 (SY Ovaron; Samyang) i.m., and those in the control group (n = 10) received no treatment at that time. Other previously synchronized cows received a CIDR (Day 0) with injections of 2 mg EB plus 50 mg P4 i.m. 8 days after ovulation (T2 group, n = 10). Thereafter, all cows received PGF2� (Lutalyse; Pharmacia & Upjohn, Puurs, Belgium) at the time of CIDR removal on Day 7, and GnRH (Conceral; Dongbang Co., Seoul, Korea) on Day 9. Ovaries of each cow were examined by transrectal ultrasonography (Sonoace 600 with 7.5 MHz linear-array transducer; Medison Co., Ltd, Seoul, Korea) every 24 h from Days 0 to 9, on Day 11, and on Day 14 of treatment to observe changes in ovarian structures (follicles and corpora lutea (CL)). Data were analyzed by Fisher's exact test, Kruskal-Wallis test, and ANOVA using an SAS program (SAS Institute, Inc., Cary, NC, USA). Follicular wave emergence occurred within 7 days in 3/10 of the control group, 9/11 of the T1 group, and 9/10 of the T2 group (P < 0.05). The interval to wave emergence did not differ (P > 0.05) among groups (3.7 � 1.2, 4.8 � 0.5, 5.9 � 0.3 days, respectively). While the diameters of dominant follicles on Day 0 were greater (P < 0.01) in the T2 group (14.3 � 1.2 mm) than in the control (9.4 � 0.6 mm) and T1 (10.5 � 0.7 mm) group, diameters of preovulatory follicles on Day 9 were significantly smaller (P < 0.01) in the T1 (13.6 � 0.7 mm) and T2 (12.3 � 0.5 mm) groups than in the control group (16.4 � 0.8 mm). Synchronized ovulation by 40 h after the GnRH injection (Day 11) occurred in 10/10 of the control group, 10/11 of the T1 group, and 9/10 of the T2 group (P > 0.05). In conclusion, administration of 2 mg EB plus 50 mg P4 at both a growing and a static phase of the dominant follicle during the first follicular wave results in synchronous follicular wave emergence and development and also synchronized ovulation in CIDR-treated, lactating dairy cows.

scholarly journals Effect of Exogenous Progesterone or Flunixin Meglumine After AI on Serum Progesterone Concentration and Pregnancy per AI in Lactating Dairy Cows

2018 ◽  
Vol 15 (2) ◽  
pp. 140-147 ◽  
Author(s):  
Saber Barkhori-Mehni ◽  
Hamed Karami-Shabankareh ◽  
Reza Masoumi ◽  
Mehdi Kazemi-Bonchenari ◽  
Adel Pezeshki ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Progesterone Concentration ◽  
Serum Progesterone ◽  
Flunixin Meglumine ◽  
Lactating Dairy Cows ◽  
Exogenous Progesterone
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