Seasonal variations in plasma hormones and reproductive efficiency in early postpartum buffalo

Bahga, C. S.; Gangwar, P. C.

doi:10.1016/0093-691x(88)90297-x

Cited by 7 publications

(3 citation statements)

References 22 publications

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“…Heat stress causes hyperprolactinemia which results in reduction of luteinizing hormone secretion and oestradiol production in anoestrus buffaloes ( Palta et al, 1997 ) leading to ovarian inactivity. The survival of embryo in the uterus is impaired due to the deficiency of progesterone in the hot season ( Bahga and Gangwar, 1988 ). This endocrine pattern may be partially responsible for the low sexual activities and low fertility in summer season in the buffaloes.…”

Section: Discussionmentioning

confidence: 99%

Influence of Temperature and Humidity on Pregnancy Rate of Murrah Buffaloes under Subtropical Climate

Dash

Chakravarty

Sah

et al. 2015

Asian Australas. J. Anim. Sci

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Heat stress has adverse effects on fertility of dairy animals. Decline in fertility is linearly associated with an increase in combination of both temperature and humidity. The purpose of this study was to investigate the relationship between temperature humidity index (THI) and the pregnancy rate of Murrah buffaloes in a subtropical climate. The effects of genetic and non-genetic factors viz., sire, parity, period of calving and age group at first calving were found non-significant on pregnancy rate. The effect of THI was found significant (p<0.001) on pregnancy rate of Murrah buffaloes calved for first time and overall pregnancy rate. The threshold THI affecting the pregnancy rate was identified as THI 75. The months from October to March showed THI<75 and considered as non heat stress zone (NHSZ), while months from April to September were determined as heat stress zone (HSZ) with THI≥75. The lowest overall pregnancy rate (0.25) was obtained in July with THI 80.9, while the highest overall pregnancy rate (0.59) was found in November with THI 66.1. May and June were identified as critical heat stress zone (CHSZ) within the HSZ with maximum decline (−7%) in pregnancy rate with per unit increase in THI. The highest overall pregnancy rate was estimated as 0.45 in NHSZ with THI value 56.7 to 73.2. The pregnancy rate was found to have declined to 0.28 in HSZ with THI 73.5 to 83.7. However, the lowest pregnancy rate was estimated as 0.27 in CHSZ with THI value 80.3 to 81.6.

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Section: Discussionmentioning

confidence: 99%

Influence of Temperature and Humidity on Pregnancy Rate of Murrah Buffaloes under Subtropical Climate

Dash

Chakravarty

Sah

et al. 2015

Asian Australas. J. Anim. Sci

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“…This release of PGFzn may favour uterine involution by stimulating myometrial contractions (LINDELL et al, 1982 a). Following parturition, high levels of PGFza metabolite have been reported in several species including the cow (EDQVIST et al, 1978;ELEY et al, 1981;LINDELL et al, 1982a;MADEJ et al, 1984), water buffalo (PERERA et al, 1981;BAHGA andGANGWAR, 1988), goat (FREDRIKSSON et al, 1984) and sheep (FREDRIKSSON, 1985). This release is not prolonged in the mare (STEWART et al, 1984) and SOW (KINDAHL et al, 1982).…”

Section: Introductionmentioning

confidence: 99%

Blood Levels of the Prostaglandin F_2α Metabolite during the Postpartum Period in Bos indicus Cows in the Humid Tropics

Toribio

Molina

Bolaños

et al. 1994

Journal of Veterinary Medicine Series A

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Summary Plasma levels of the prostaglandin F2α metabolite (15‐ketodihydroprostaglandin F2α) were determined by radioimmunoassay in 26 postpartum multiparous Brahman cows. Variation in the concentrations of the metabolite was high among animals. 15‐Ketodihydro‐PGF2α concentrations on day 0, 5, 10, 15 and 20 postpartum ranged from 402 to ≥1000, from 251 to ≥1000, from 237 to ≥1000, from 75 to 608 and from 75 to 267 pmol l−1, respectively. The prostaglandin metabolite levels were elevated at parturition and remained elevated thereafter for periods varying up to 10 to 23 days postpartum (16.7 ± 0.7 days, mean ± SEM). Uterine involution (UI) was completed by 28.0 ± 0.8 days (ranging from 20 to 36 days). A markedly linear decrease of 15‐ketodihydro‐PGF2α levels (P < 0.001) occurred from parturition until Day 23 postpartum. A significant correlation between the duration of the elevated PGF2α metabolite and the time required for completion of UI was observed (r = −0.50, P < 0.01). The effect of parity (PT) on 15‐ketodihydro‐PGF2α levels was not significant, however the relationship between UI and PT was affected (r = −0.59, P < 0.001). Both PGF2α release and PT had effects on the variability of UI (R2 = 0.62, P < 0.001). No significant relationship was found between elevated levels of 15‐ketodihydro‐PGF2α, UI and PT with postpartum anoestrous interval (PPAI).

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“…According to the farmers, in Mustang district, the more-longer period the pregnant animal comes down to river belt from their normal high altitude pasture the cases of abortion are more. Under controlled heat stress, several studies have showed that progesterone concentrations were reduced during the luteal phase (Stott and Wiersma 1973, Rao and Pandey 1982, Bahga and Gangwar 1988 which is necessary for the maintenance of pregnancy. Nutritional deficiency, especially, mineral deficiency may also be one of the reasons for repeat breeding as none of the farmers were using mineral mixture in the feed.…”

Section: Resultsmentioning

confidence: 99%

Reproductive Disorders and Seroprevalence of Brucellosis in Yak

Aryal

Paudel

2014

Nepal Agric. Res. J.

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A study on reproductive disorders among yaks in Mustang and Solukhumbu districts and seroprevalence of brucellosis among yaks in Mustang and Myagdi districts was conducted. Eleven farmers having 383 female and 72 male yaks in Mustang and 129 female and 27 male yaks in Solukhumbu districts were taken by purposive random sampling for the study on reproductive disorders. Likewise Sixty-seven serum samples were also collected from adult female yaks having history of abortion and retained placenta, and from male yaks used for breeding purpose from Mustang and Myagdi districts. An average of 12.63% of female yaks aborted, 7.26% had had retention of placenta and 6.6% repeat breeders in Mustang district. Similarly, 6.3% had abortion, 2.09% retained placenta and 6.5% repeat breeders in Solukhumbu district. However, all the 67 serum samples examined were found negative to the Brucella abortus antibody on ELISA test suggesting that the yak population was free from brucellosis in these areas. Thus abortion and retention of placenta in Yak in Mustang district may not be due to brucellosis. A detail study should be done to find the specific cause of abortion and repeat breeding to recommend preventive and control measures.

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Seasonal variations in plasma hormones and reproductive efficiency in early postpartum buffalo

Cited by 7 publications

References 22 publications

Influence of Temperature and Humidity on Pregnancy Rate of Murrah Buffaloes under Subtropical Climate

Influence of Temperature and Humidity on Pregnancy Rate of Murrah Buffaloes under Subtropical Climate

Blood Levels of the Prostaglandin F_2α Metabolite during the Postpartum Period in Bos indicus Cows in the Humid Tropics

Reproductive Disorders and Seroprevalence of Brucellosis in Yak

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Seasonal variations in plasma hormones and reproductive efficiency in early postpartum buffalo

Cited by 7 publications

References 22 publications

Influence of Temperature and Humidity on Pregnancy Rate of Murrah Buffaloes under Subtropical Climate

Influence of Temperature and Humidity on Pregnancy Rate of Murrah Buffaloes under Subtropical Climate

Blood Levels of the Prostaglandin F2α Metabolite during the Postpartum Period in Bos indicus Cows in the Humid Tropics

Reproductive Disorders and Seroprevalence of Brucellosis in Yak

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Blood Levels of the Prostaglandin F_2α Metabolite during the Postpartum Period in Bos indicus Cows in the Humid Tropics