scholarly journals Hormonal Profile Study of Bangladeshi Crossbred Dairy Cows in Relation to Repeat Breeding

2020 ◽  
pp. 100-103
Keyword(s):  
Luteinizing Hormone ◽  
Dairy Cows ◽  
Follicle Stimulating Hormone ◽  
Economic Loss ◽  
Normal Functioning ◽  
Normal Cycle ◽  
Hormonal Profile ◽  
Breeding Condition ◽  
Profile Study ◽  
Repeat Breeder

The repeat breeding condition affects both the fertility of cows and the economy of farmers and the nation. Normal levels of various biochemical constituents are indispensable for the normal functioning of various body systems of animals, including the reproductive system. The hormonal profile is an indicator of the reproductive status and aids in the prognosis and restoration of animal fertility. The present study explores the implication of four hormones (luteinizing hormone, follicle-stimulating hormone, human chorionic gonadotropin and prolactin) on the normal cycle breeding process of Bangladeshi normal cyclic cows and repeat breeder dairy cows. Among four hormones, the levels of luteinizing hormone and prolactin were significantly different between the normal cyclic cows and repeat breeder cows. The assessment of hormonal profile aids in ameliorating the repeat breeding conditions of the dairy cows. The findings of the present study could be applied in overcoming repeat breeding problems in dairy cows and thus, economic loss could be lessened.

scholarly journals Hormonal Profile Study of Bangladeshi Crossbred Dairy Cows in Relation to Repeat Breeding

2020 ◽  
Vol 8 (3) ◽  
pp. 100-103
Keyword(s):  
Luteinizing Hormone ◽  
Dairy Cows ◽  
Follicle Stimulating Hormone ◽  
Economic Loss ◽  
Normal Functioning ◽  
Normal Cycle ◽  
Hormonal Profile ◽  
Breeding Condition ◽  
Profile Study ◽  
Repeat Breeder

The repeat breeding condition affects both the fertility of cows and the economy of farmers and the nation. Normal levels of various biochemical constituents are indispensable for the normal functioning of various body systems of animals, including the reproductive system. The hormonal profile is an indicator of the reproductive status and aids in the prognosis and restoration of animal fertility. The present study explores the implication of four hormones (luteinizing hormone, follicle-stimulating hormone, human chorionic gonadotropin and prolactin) on the normal cycle breeding process of Bangladeshi normal cyclic cows and repeat breeder dairy cows. Among four hormones, the levels of luteinizing hormone and prolactin were significantly different between the normal cyclic cows and repeat breeder cows. The assessment of hormonal profile aids in ameliorating the repeat breeding conditions of the dairy cows. The findings of the present study could be applied in overcoming repeat breeding problems in dairy cows and thus, economic loss could be lessened.

scholarly journals Implication of some biochemical parameters on normal cyclic and repeat breeding process in Bangladeshi dairy cows

2020 ◽  
Vol 6 (2) ◽  
pp. 305-310
Author(s):  
Mohammad Azizur Rahman ◽  
Anowar Us Sadat ◽  
Forhad Uddin ◽  
Morshed Alam ◽  
Ahsan Habib
Keyword(s):  
Dairy Cows ◽  
Total Protein ◽  
Biochemical Parameters ◽  
Economic Loss ◽  
Inorganic Phosphorus ◽  
Domestic Animals ◽  
Reproductive Disorders ◽  
Current Observation ◽  
Breeding Condition ◽  
Repeat Breeder

Repeat breeding is one the most common reproductive disorders that hinders favorable productivity in domestic animals. Repeat breeding in dairy cows not only affects the fertility of the cattle to a considerable extent but also incurs great economic loss to the farmer. Biochemical profile can indicate the nutritional status and help in diagnosis and management of infertility in animals. Present study explores the implication of some biochemical parameters (total protein, bilirubin and some macro minerals as calcium, inorganic phosphorus and magnesium) on normal cyclic breeding process of Bangladeshi dairy cows. Current observation indicates that the lower calcium, inorganic phosphorus and magnesium concentrations might be associated with the ovulatory disturbances in repeat breeder cows. On the other hand, total protein and bilirubin do not play a significant role in causing repeat breeding problem in those cows. Thus, this study provides supportive evidence about the importance of calcium, inorganic phosphorus and magnesium in the resumption of repeat breeding condition. Asian J. Med. Biol. Res. June 2020, 6(2): 305-310

LEVELS OF FOLLICLE-STIMULATING HORMONE, LUTEINIZING HORMONE, OESTRADIOL-17β AND PROGESTERONE, AND FOLLICULAR GROWTH IN THE PSEUDOPREGNANT RAT

1975 ◽  
Vol 64 (1) ◽  
pp. 37-47 ◽  
Author(s):  
R. WELSCHEN ◽  
P. OSMAN ◽  
J. DULLAART ◽  
W. J. DE GREEF ◽  
J. TH. J. UILENBROEK ◽  
...  
Keyword(s):  
Luteinizing Hormone ◽  
Follicle Stimulating Hormone ◽  
Blood Levels ◽  
Normal Cycle ◽  
Antral Follicles ◽  
A Value ◽  
Wide Range ◽  
Lh Release ◽  
Competitive Protein Binding ◽  
Stimulating Hormone

SUMMARY Throughout a period of pseudopregnancy the peripheral blood levels of progesterone, oestradiol-17β, follicle-stimulating hormone (FSH) and luteinizing hormone (LH), as well as the size-distribution of ovarian antral follicles were estimated in the rat. The progesterone concentrations, as measured by a competitive protein-binding technique, exceeded metoestrous values (25 ng/ml plasma) from day 3 of pseudopregnancy onwards. The highest levels were found on days 6 and 8 (91 ng/ml). From day 8 onwards the levels decreased gradually but were still above metoestrous values on the day of pro-oestrus after pseudopregnancy. Concentrations of oestradiol-17β, as measured by radioimmunoassay, were within the range of those at metoestrus (about 5 pg/ml plasma) until day 10. Thereafter levels increased to a value of 57 pg/ml. Concentrations of FSH, measured by radioimmunoassay, were within the range of metoestrous values until day 10 (about 100 ng NIAMD-rat-FSH RP-1/ml serum), but declined to a level of 33 ng/ml on day 12. Concentrations of LH, measured by radioimmunoassay, were generally within the wide range of metoestrous values (9–60 ng NIAMD-rat-LH RP-1/ml serum), but concentrations found on days 4, 8 and 10 were significantly lower than those found on preceding or subsequent days. Histological determination of the number of follicles present in various volume-classes, showed an increase in antral follicles on days 1 and 2, comparable to the increase observed during metoestrus and dioestrus 1 of the normal cycle. There was no change in the follicles between days 3 and 10 and they resembled those of early dioestrus. Preovulatory growth had occurred by day 12. Injection of human chorionic gonadotrophin (HCG) on days 2, 4 or 6 showed that ovulation could be induced only in some of the larger follicles. On the basis of these results it is suggested that during pseudopregnancy the high progesterone levels present result in a decreased plasma LH level which is insufficient to cause full maturation of the follicles and to stimulate oestrogen secretion to the levels required for induction of an ovulatory surge of LH release.

MECHANISM OF THE SELECTIVE SURGE OF FOLLICLE-STIMULATING HORMONE IN DIOESTROUS RATS DURING THE INDUCTION OF OVULATION BY HUMAN CHORIONIC GONADOTROPHIN

1980 ◽  
Vol 86 (3) ◽  
pp. 489-495 ◽  
Author(s):  
SHUJI SASAMOTO ◽  
KAZUYOSHI TAYA
Keyword(s):  
Luteinizing Hormone ◽  
Follicle Stimulating Hormone ◽  
Time Of Day ◽  
Chorionic Gonadotrophin ◽  
Human Chorionic Gonadotrophin ◽  
Normal Cycle ◽  
Luteinizing Hormone Releasing Hormone ◽  
Immature Rats ◽  
Lh Release ◽  
Lh Rh

A selective surge of FSH with a small concomitant rise in LH occurred invariably in rats when ovulation was induced by injecting human chorionic gonadotrophin (HCG) at various reproductive stages such as day 15 of lactation and in 29-day-old immature rats as well as in dioestrous animals. No FSH surge occurred on day 3 of lactation or in 26-day-old immature rats in which ovulation could not be induced by HCG. The FSH surge occurred 6–18 h after HCG treatment regardless of the time of day of injection of HCG. Ovulation began by 12 h and was completed by 18 h after injection of HCG. Pituitary responsiveness to luteinizing hormone releasing hormone (LH-RH) with respect to FSH release strikingly increased at 01.00 h on day 1 after HCG injection at 17.00 h of dioestrus (day 0) to levels similar to those of the group at 01.00 h of oestrus, when the greatest response was noted during the normal cycle. With regard to LH release pituitary responsiveness to LH-RH at 01·00 h on day 1 markedly increased but the response was only about half of the response at 01·00 h of oestrus and one third of the response at 17.00 h of pro-oestrus when the greatest response was noted during the normal oestrous cycle. These results indicate that during ovulation the pituitary gland of the rat is highly responsive to LH-RH with respect to the release of FSH, for which secretory changes in the ovary after an ovulating dose of HCG may be responsible.

19 EFFECTS OF ESTRADIOL OR GnRH ON FOLLICULAR WAVE EMERGENCE AND PREGNANCY RATES FOR A CIDR-BASED TIMED AI PROTOCOL IN REPEAT BREEDER DAIRY COWS

2007 ◽  
Vol 19 (1) ◽  
pp. 128
Author(s):  
G. H. Suh ◽  
U. H. Kim ◽  
T. Y. Hur ◽  
S. J. Kang ◽  
K. S. Baek ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Follicular Development ◽  
Economic Loss ◽  
Estradiol Benzoate ◽  
Pregnancy Rates ◽  
Corpora Lutea ◽  
Chi Square ◽  
Follicular Wave ◽  
Array Transducer ◽  
Repeat Breeder

Repeat breeding of a high yielding cow causes enormous economic loss to the dairy producers. In this study, we examined the effect of estradiol benzoate (EB) or GnRH on follicular wave emergence and follicular development, and on pregnancy rates for a CIDR-based timed AI (TAI) protocol in repeat breeder dairy cows. Repeat breeder cows received a CIDR device (InterAg, Hamilton, New Zealand), with an injection of 1 mg EB (SY Esrone�; Samyang, Seoul, Korea) plus 50 mg progesterone (P4; SY Ovaron�; Samyang) (EB + P4 group, n = 36) or with an injection of 250 �g Gonadorelin (GnRH, Fertagyl�; Intervet, Boxmeer, The Netherlands) (GnRH group, n = 35) at the beginning of the experiment (Day 0). On Day 7, CIDR devices were removed and all cows received PGF2� (Lutalyse�; Pharmacia & Upjohn, Puurs, Belgium). Thereafter, cows in the EB + P4 group received an injection of 1 mg EB on Day 8, and TAI 30 h later; those in the GnRH group received an injection of 250 �g GnRH on Day 9, and TAI 19 h later. In a subset of cows for both groups (15 cows from each group), the ovaries of the cows were examined by transrectal ultrasonography (Sonoace 600 with 7.5 MHz linear-array transducer; Medison Co., Seoul, Korea) every 24 h from Days 0 to 8, on Day 10, and on Day 13 for the EB + P4 group, and every 24 h from Days 0 to 9, on Day 11, and on Day 14 for the GnRH group, to observe changes in ovarian structures (follicles and corpora lutea). Pregnancy was diagnosed 35 to 60 days after TAI, using both ultrasonography and rectal palpation. Data were analyzed using Fisher's exact, Student's t-, and chi-square tests. Follicular wave emergence occurred within 7 days in 12/15 EB + P4-treated and 13/15 GnRH-treated cows (P > 0.05). The mean diameters of preovulatory follicles were smaller (P < 0.05) in the EB + P4 group (12.1 � 0.1 mm) than in the GnRH group (13.8 � 0.1 mm). However, the proportion of cows with synchronized ovulation and pregnancy rates to TAI did not differ (P > 0.05) between the EB + P4 (11/15 and 19.4%, respectively) and the GnRH (13/15 and 34.3%, respectively) groups. In conclusion, treatment with either EB or GnRH for a CIDR-based TAI protocol in repeat breeder dairy cows results in synchronous follicular wave emergence, follicular development, and ovulation, and thus similar pregnancy rates to TAI.

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