Postpartal Ovarian Function in Holstein and Crossbred Cows on Large Scale Farms in Hungary

Huszenicza, G.; Molńar, László; Solti, L.; Haraszti, J.

doi:10.1111/j.1439-0442.1987.tb00279.x

Cited by 25 publications

(10 citation statements)

References 26 publications

(42 reference statements)

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“…The interval elapsed from calving to the first regular P4 elevation (detected from at least 2 consecutive samples, with peak concentration above 1-00 nmoV1) was considered as postpartum acyclic period. The duration of subsequent CL phases (with elevated P4 values) as well as of follicular phases (with baseline P4 levels) were estimated (Huszenicza et al, 1987). Forced ZuteoZysis attributable to the simultaneous inflammation was supposed when mastitis was observed in a CL phase but baseline P4 value was detected in the subsequent sample.…”

Section: Methodsmentioning

confidence: 99%

Gram‐negative Mastitis in Early Lactation May Interfere with Ovarian and Certain Endocrine Functions and Metabolism in Dairy Cows

Huszenicza

Jánosi²,

Kulcsár

et al. 1998

Reprod Domestic Animals

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ContentsIn two field trials the interrelation of (Gram-negative) mastitis with postpartum blood levels of certain hormons (insulin, IGF-1, cortisol, thyroxin and triiodothyronine) and metabolites (glucose, acetoacetate, @OH-butyrate, non-esterified fatty acid and total cholesterol, TCh) were studied. On days 1-3 and 28-35 also the ACTH stimulated adreno-cortical cortisol response was determined. The resumption of cyclic ovarian function was investigated by progesterone profiles based on milk samples collected 3 times a week for about I 1-12 weeks after calving. The early puerperal cases of Gram-negative (GN) mastitis were followed by a temporary decrease in plasma insulin and IGF-1 levels and also the TCh concentrations were lower than in healthy cows, but did not postpone the first postpartum ovulation. The (GN) mastitis in late puerperal phase delayed both the first postpartum ovulation and visable estrus. In cyclic cows forced luteolysis (in luteal phase) and disturbances in ovulatory mechanism (in follicular phase) were the consequences of this disease, although no increase in occurrence of ovarian cysts were observed.

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Section: Methodsmentioning

confidence: 99%

Gram‐negative Mastitis in Early Lactation May Interfere with Ovarian and Certain Endocrine Functions and Metabolism in Dairy Cows

Huszenicza

Jánosi²,

Kulcsár

et al. 1998

Reprod Domestic Animals

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“…Although problematic, the possible reason for better responses of primiparous cows to fertility and synchronization protocols is that there is a lower risk of metabolic problems in early lactation (Erb and Grohn, 1988;Gröhn and Rajala-Schultz, 2000). Similarly, Huszenicza et al (1987) showed that reproductive disorders, except for the later onset of the postpartum ovarian activity, were less frequent in primiparous cows compared with others. More recently, Meikle et al (2004) contrarily indicated that the effect of NEB was observed more on primiparous cows than multiparous cows.…”

Section: Discussionmentioning

confidence: 99%

Effects of blood ²-hydroxybutyric acid levels on the response to Ovsynch in primiparous cows

Salar¹,

Baştan²

2017

Anim Reprod

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The aim of this study was to investigate the effects of low and moderate blood β-hydroxybutyric acid (BHBA) levels in primiparous cows during the early postpartum period on follicle development and pregnancy rate after the Ovsynch protocol. Holstein primiparous cows with low (n = 85) and moderate (n = 71) BHBA concentrations were used as experimental animals. At 7-8 weeks postpartum, blood samples were collected and the Ovsynch protocol was performed on the same day. Ultrasonographic examination was performed to determine the dominant follicle (DF) diameter and presence of corpus luteum on the day of the first and second gonadotropin releasing hormone (GnRH1 and GnRH2) injections and prostaglandin F2 alpha (PGF2α) injection as well as 24 and 48 h after the GnRH1 and PGF2α injections. The ovulatory response to GnRH1 and pregnancy rate at day 30 and day 60 postinsemination were also evaluated. No significant differences were observed between groups in the DF diameter on the day of GnRH1 and PGF2α injections, and at 24 and 48 h after these injections, as well as in the ovulation and atresia response to GnRH1 (P > 0.05). Significant differences were observed between groups in DF diameter (low-BHBA group, 13.8 ± 0.2 mm; moderate-BHBA group, 13.2 ± 0.2 mm; P = 0.039) at the time of insemination, and in pregnancy rates at 30 days (low-BHBA group, 38.82%; moderate-BHBA group, 21.13%, P = 0.017) and 60 days after insemination (37.6 and 18.3%, respectively; P = 0.008). Our findings suggest that moderate blood levels of BHBA (0.80-1.19 mmol/L) in primiparous cows during the early postpartum period affect the response to the Ovsynch protocol.

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“…Possible reasons for better fertility in primiparous cows include reduced risk of metabolic disorders and less reproductive problems in early lactation. Older cows are more susceptible to metabolic (Erb and Grohn 1988) and reproductive (Huszenicza et al. 1987) problems than primiparous cows.…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, apart from the late onset of cyclicity, primiparous cows had fewer reproductive problems compared with pluriparous cows (Whitmore et al. 1974; Huszenicza et al. 1987).…”

Section: Discussionmentioning

confidence: 99%

First Service Pregnancy Rates Following Post-AI Use of hCG in Ovsynch and Heatsynch Programmes in Lactating Dairy Cows

Shabankareh

Zandi

Ganjali

2009

Reproduction in Domestic Animals

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Lactating dairy cows (n = 667) at random stages of the oestrous cycle were assigned to either ovsynch (O, n = 228), heatsynch (H, n = 252) or control (C, n = 187) groups. Cows in O and H groups received 100 microg of GnRH agonist, i.m. (day 0) starting at 44 +/- 3 days in milk (DIM), and 500 microg of cloprostenol, i.m. (day 7). In O group, cows received 100 microg of GnRH (day 9) and were artificially inseminated without oestrus detection 16-20 h later. In H group, cows received 1 mg oestradiol benzoate (EB) i.m., 24 h after the cloprostenol injection and were artificially inseminated without oestrus detection 48-52 h after the EB injection. Cows in C group were inseminated at natural oestrus. On the day of artificial insemination (AI), cows in all groups were assigned to subgroups as follows: human Chorionic Gonadotrophin (O-hCG) (n = 112), O-saline (n = 116), H-hCG (n = 123), H-saline (n = 129), C-hCG (n = 94) and C-saline (n = 93) subgroups. Cows in hCG and saline subgroups received 3000 IU hCG i.m. and or 10 ml saline at day 5 post-AI (day 15), respectively. Pregnancy status was assessed by palpation per rectum at days 40 to 45 after AI. The logistic regression model using just main effects of season (summer and winter), parity (primiparous and pluriparous), method(1) (O, H and C) and method(2) (hCG and saline) showed that all factors, except method(1), were significant. Significant effects of season (p < 0.01), hCG and parity (p < 0.01), and a trend of parity and season (p < 0.1) were detected. A clear negative effect of warm period on first service pregnancy rate was noted (p < 0.01). The pregnancy rate was the lowest in the H protocol during warm period (p < 0.05). Treatment with hCG 5 days after AI significantly improved pregnancy rates in those cows that were treated with the H protocol compared with saline treatments (41.5% vs 24.8%; p < 0.01). O and H were more effective in primiparous than in pluriparous cows (46.1% vs 29.9%; p < 0.1 and 43.6% vs 24.6%; p < 0.01). First service pregnancy rates were higher in primiparous hCG-treated than in pluriparous hCG-treated cows (57.9% vs 32.3%; p < 0.01). The pregnancy rate was higher for the hCG-treated cows compared with saline-treated cows during warm period (37.9% vs 23.6%; p < 0.001).

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Postpartal Ovarian Function in Holstein and Crossbred Cows on Large Scale Farms in Hungary

Cited by 25 publications

References 26 publications

Gram‐negative Mastitis in Early Lactation May Interfere with Ovarian and Certain Endocrine Functions and Metabolism in Dairy Cows

Gram‐negative Mastitis in Early Lactation May Interfere with Ovarian and Certain Endocrine Functions and Metabolism in Dairy Cows

Effects of blood ²-hydroxybutyric acid levels on the response to Ovsynch in primiparous cows

First Service Pregnancy Rates Following Post-AI Use of hCG in Ovsynch and Heatsynch Programmes in Lactating Dairy Cows

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