A comparison of two dosages of fluorogestone acetate in pessaries on the quality of embryos recovered from superovulated ewes

Scudamore, Cheryl L.; Robinson, Jennifer D.; Aitken, Raymond; Robertson, I.S.

doi:10.1016/0093-691x(92)90201-2

Cited by 14 publications

(3 citation statements)

References 17 publications

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“…Removal of devices or implant or stoppage of injections of progesterone resulted in rapid decline of the hormone in a way expected to follow a biexponentail curve with a half-life of 26 min (Al-Busadah and Homeida, 2004). Comparable studies have been performed in cows (Narasimha and Suraprakasam, 1992) and ewes (Scudamore et al, 1992) using intravaginal devices of progesterone. The type of device or dosage of steroid which might produce response such as follicular growth accelerate ovum development (Thompson et al, 1990 andScudamore et al, 1992).…”

Section: Serum Estradiol 17-β (E 2 ) and Progesterone (P 4 ) Concentrmentioning

confidence: 99%

“…Comparable studies have been performed in cows (Narasimha and Suraprakasam, 1992) and ewes (Scudamore et al, 1992) using intravaginal devices of progesterone. The type of device or dosage of steroid which might produce response such as follicular growth accelerate ovum development (Thompson et al, 1990 andScudamore et al, 1992).…”

Section: Serum Estradiol 17-β (E 2 ) and Progesterone (P 4 ) Concentrmentioning

confidence: 99%

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Influence of Progestin Source on Some Blood Biochemical Constituents of Dromedary She-Camels During Induction of Ovulation in the North Western Coast of Egypt

Hamid

Zaghloul

El-Bahrawy

et al. 2015

Egyptian Journal of Animal Production

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Eighteen one-humped she-camels were divided randomly into three equal groups: group 1 served as control; group 2 (MGA) received (0.5 mg/ head/day) of Melengestrol acetate for 10 days and; group 3 (CIDR) were fitted intravaginally with controlled internal drug release (CIDR, 1.38g P 4) for 10 days. At day 10 the MGA and CIDR groups were administered PGF 2α and 3000 IU PMSG, MGA feeding was withdrawn and CIDRs were removed. Animals were given 5000 IU of hCG 10 days later and were artificially inseminated (day 20). Blood samples were collected from all groups at day 0 = day of CIDR insertion and beginning of MGA feeding; day 5 = 5 days after CIDR insertion and onset of MGA feeding; day 10 = day of CIDR removal and MGA feeding withdrawal; and day 20 = day of hCG injection. Serum biochemical and mineral constituents, and serum reproductive hormones (estradiol-17β and progesterone) were determined. Overall means of serum concentrations of total protein, albumin, cholesterol, and AST enzyme were not different among treatments. Treatment with CIDR increased BUN at days 10 and 20 and the overall mean BUN concentration compared to control and MGA groups. Treatments with CIDR and MGA numerically increased serum glucose compared to control at days 10 and 20. However, overall mean serum concentrations of HDL were not affected by CIDR and treatments. In the meantime, CIDR and MGA increased serum ALT concentrations at days 20 and the overall means ALT concentrations compared to control. No marked changes were detected in serum concentrations of Ca ++ and Na + in the MGA and CIDR groups compared to controls. Serum concentrations of K + were increased at day 20 in the MGA and CIDR groups than at days 0 and 5. Overall mean serum concentration of K + was greater in the CIDR group (4.2 ± 0.14 mEq/l) than in control (3.4 ± 0.16 mEq/l) and MGA (3.5 ± 0.14 mEq/l) groups. Similar trend was detected in serum concentrations of P as MGA and CIDR groups had more (P < 0.01) serum P (4.7 ± 0.36 and 4.6 ± 0.24 mg/dl) at days 20 compared to days 0, 5 and 10. Results also indicated that natural progestin treatment (CIDR) increased P 4 concentration at days 5 and 10 while control and MGA-fed animals had lower P 4 levels. Also, CIDR increased the overall mean P 4 concentration (2.9 ± 0.28 ng/ml) compared to control and MGA groups (0.5 ± 0.33 and 0.9 ± 0.29 ng/ml). Both MGA and CIDR groups had lower estradiol at days 5 and 10. At day 20, estradiol was elevated in the CIDR group compared to control and MGA groups. In conclusion, progestin treatments exerted no deleterious effects on animal health and can be used without limitation for further treatments. Natural P 4 improved the pattern of reproductive hormones secretion without detrimental effects on animal health and blood biochemical constituents.

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Section: Serum Estradiol 17-β (E 2 ) and Progesterone (P 4 ) Concentrmentioning

confidence: 99%

Section: Serum Estradiol 17-β (E 2 ) and Progesterone (P 4 ) Concentrmentioning

confidence: 99%

Influence of Progestin Source on Some Blood Biochemical Constituents of Dromedary She-Camels During Induction of Ovulation in the North Western Coast of Egypt

Hamid

Zaghloul

El-Bahrawy

et al. 2015

Egyptian Journal of Animal Production

View full text Add to dashboard Cite

show abstract

“…It seems that MGA did not increase the natural progesterone in the peripheral circulation after withdrawal; however, it mimicked its function on synchronizing ovarian activities. This, in turn, should induce follicular growth, accelerate ovum development and therefore lower concentration of progesterone (Thompson et al, 1990;Scudamore et al, 1992), while the increased of serum progesterone in control group may be due to variations in ovarian activity. treated and untreated with MGA, where lambs birth weights were 4.6, 4.6 and 4.7 kg for control, MGA and MGA+PG600, respectively.…”

Section: Serum Estradiol 17-β (E2) and Progesterone (P4) Concentrationsmentioning

confidence: 99%

Influence of short- and long-term administration of Melengestrol acetate on estrus activity and reproductive performance of nulliparous Barki ewes

Farrag¹,

El-Hamid²,

El-Hawy³

et al. 2018

IJEAB

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Factors Affecting the Viability of Fresh and Cryopreserved Embryos

Shelton

1993

Biotechnology in Agriculture

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A comparison of two dosages of fluorogestone acetate in pessaries on the quality of embryos recovered from superovulated ewes

Cited by 14 publications

References 17 publications

Influence of Progestin Source on Some Blood Biochemical Constituents of Dromedary She-Camels During Induction of Ovulation in the North Western Coast of Egypt

Influence of Progestin Source on Some Blood Biochemical Constituents of Dromedary She-Camels During Induction of Ovulation in the North Western Coast of Egypt

Influence of short- and long-term administration of Melengestrol acetate on estrus activity and reproductive performance of nulliparous Barki ewes

Factors Affecting the Viability of Fresh and Cryopreserved Embryos

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