Progesterone and estrogen levels in serum of cycling goats measured by enzyme immunoassay

Bauernfeind, M; Holtz, W.

doi:10.1016/0921-4488(91)90012-f

Cited by 18 publications

(10 citation statements)

References 27 publications

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“…This could be attributed to individual variations within the breed. Similar differences in progesterone levels were reported by Bauernfeind & Holtz (1991) in Dairy x Boer in Germany. In the ewe, similar differences in progesterone levels were reported by Herriman et al (1979) in Dorset Horn x Finnish Landrace in the UK, and in some prolific sheep breeds in Poland (Reklewska et al 1988).…”

Section: Discussionsupporting

confidence: 87%

“…The serum progesterone patterns reported here agree with those reported for Red Sokoto in Nigeria (Pathiraja et al 1991), Dairy x Boer in Germany (Bauernfeind & Holtz 1991), and Alpine in Italy (Bono et al 1983).…”

Section: Discussionsupporting

confidence: 81%

“…Using radioimmunoassay, Zarkawi (1997) also found differences in the maximum progesterone level in the Syrian Awassi ewes during the luteal phase of the oestrous cycle, with a range of 5.8-18.00 nmol I" 1 . The progesterone levels below 3.18 nmol I" 1 for 2.9 days at the start of the oestrous cycle and for 3.1 days at the end of the oestrous cycle (follicular phase) confirm Bauernfeind & Holtz's (1991) suggestion that the corpora lutea constitute the main source of progesterone in goats, and that progesterone levels above 3.18 nmol I" 1 are found during the luteal phase which lasts for a mean period of 15.3 days.…”

Section: Discussionsupporting

confidence: 76%

“…The oestrous cycle has been characterised in several animals, including cows (Darwash et al 1999), ewes , mares (Mantri et al 1985), elephants (Hodges 1998), guinea-pigs (Blatchley et al 1976), rats (Dupon & Kim 1973), and hens (Shodono et al 1975). In does, the oestrous cycle has been characterised in breeds such as Murciana-Grannadina in Spain (DeBulnes et al 1999), Alpine in Italy (Bono et al 1983), Red Sokoto in Nigeria (Pathiraja et al 1991), Dairy x Boer in Germany (Bauernfeind & Holtz 1991), Black Bengal in India (Kumbhakar & Prasad 1998), and Dutch White in Holland ( Van de Wiel et al 1991).…”

Section: Introductionmentioning

confidence: 99%

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Serum progesterone levels using radioimmunoassay during oestrous cycle of indigenous Damascus does

Zarkawi

Soukouti

2001

New Zealand Journal of Agricultural Research

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An experiment was conducted on Damascus does to characterise the oestrous cycle and activity of the corpus luteum and to determine normal progesterone patterns during different phases of the oestrous cycle using radioimmunoassay. Fifteen 2-5-year-old indigenous cycling Damascus does were used during the normal breeding season for two consecutive oestrous cycles. Average length of the oestrous cycles was 21.2 ± 1.5 days (range: 19-26 days), consisting of 2.9 + 0.8 days (2-5 days) where progesterone level was low, averaging 0.69 ± 0.85 nmol l -1 (range: 0.00-3.08 nmol l -1 ), followed by a sharp increase in progesterone secretion indicating presence of active corpora lutea which lasted an average of 15.3 ± 1.4 days (range: 13-20 days), with an average progesterone level of 13.41 nmol l -1 (range: 3.26-27.98 nmol l -1 ), followed by a sharp decline in progesterone level, indicating inactive corpora lutea, which lasted an average of 3.1 ± 0.6 days (range: 2-5 days), with an average progesterone level of 0.68 nmol l -1 (range: 0.00-2.81 nmol l -1 ). Maximum progesterone level during the luteal phase averaged 18.67 ± 3.15nmol l -1 (range: 14.00-27.98 nmol l -1 ), which, on average, occurred on the 12.2th ± 3.2 day of the oestrous cycle. It was possible, for the first time, to characterise the oestrous cycle of the indigenous Damascus doe, and to determine normal progesterone patterns during different phases of the oestrous cycle. Based on the results reported above, it is also concluded that progesterone levels under 3.18 nmol l -1 were found on average during 2.9 days at the start of the oestrous cycle and during 3.1 days at the end of the oestrous cycle (follicular phase), and that progesterone levels above 3.18 nmol l -1 were found during the luteal phase lasting, on average, for 15.3 days.

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Section: Discussionsupporting

confidence: 87%

Section: Discussionsupporting

confidence: 81%

Section: Discussionsupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

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Serum progesterone levels using radioimmunoassay during oestrous cycle of indigenous Damascus does

Zarkawi

Soukouti

2001

New Zealand Journal of Agricultural Research

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“…Progesterone (PGS) level determination is a reliable method in the assessment of cyclic ovarian activity (Prvanovic et al, 2007). The corpus luteum is the main source of PGS in goats (Bauernfeind & Holtz, 1991). When the PGS level is 1.0 ng/ml or higher, ovarian activities occur (Bauernfeind & Holtz, 1991;Djuricic et al, 2011;Gonzalez et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

The onset of puberty in Cameroon Dwarf goats kept as pets in northwestern Croatia

Đuričić

Vince

Valpotić

et al. 2016

Reprod Domestic Animals

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The aim of this study was to determine onset of puberty in Cameroon Dwarf goats (CDGs) kept as pets in northwestern Croatia by determining progesterone (PGS) and insulin-like growth factor-I (IGF-I) levels in the blood by RIA methods. The first cyclic ovarian activity was estimated according to hormone profiles as determined in CDG in a moderate climate environment. Sixteen female CDG kids were kept in stables with access to pasture which provided space for exercise. The goat kids born in winter (December-January-February), spring (March-April-May), summer (June-July-August) and autumn (September-October-November) were assigned into four groups according to the season of the year of birth (n = 4 in each group). At 75 days of age at the initiation of the study, they weighed between 3.2 and 5.1 kg (4.24 ± 0.53 kg). The onset of ovulatory activity was determined by PGS and IGF-I serum concentrations every 10 days starting from 75 days to 155 days of age. The onset of puberty in CDG kids occurred on average at 141.15 ± 2.66 days of age, but varied depending on the season of birth. All CDG kids born during summer were in heat by 155 days of age. In the other groups (kids born in autumn, winter or spring), one goat in each group was not in heat. Changes in blood serum PGS and IGF-I concentrations during prepubertal and pubertal periods could aid in the evaluation of reproductive status and determination of the onset of puberty in CDG during all seasons of the year in a moderate climate region.

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The Buck Effect

Islam,

Parmar

2024

Elements of Reproduction and Reproductive Diseases of Goats

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Progesterone and estrogen levels in serum of cycling goats measured by enzyme immunoassay

Cited by 18 publications

References 27 publications

Serum progesterone levels using radioimmunoassay during oestrous cycle of indigenous Damascus does

Serum progesterone levels using radioimmunoassay during oestrous cycle of indigenous Damascus does

The onset of puberty in Cameroon Dwarf goats kept as pets in northwestern Croatia

The Buck Effect

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