The Comparative Reproductive Performance of Nursed Cows and Milked Cows

Wiltbank, J. N.; Cook, A. C.

doi:10.2527/jas1958.173640x

Cited by 106 publications

(35 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The anoestrous period invariably observed in post-partum lactating cows is extended when they are suckled (Clapp, 1937 ; Wiltbank & Cook, 1958) and milked cows usually ovulate earlier than suckled cows after calving (Casida et al, 1968). A prolonged post-partum anoestrous period in some beef cows may extend the interval between successive parturitions above the optimal period of 1 year and the present investigations were designed to study the efficacy of LH-RH treatment to induce earlier ovulation in the suckled beef cow.…”

Section: Introductionmentioning

confidence: 99%

Response of cyclic and post-partum suckled cows to injections of synthetic LH-RH

Webb¹,

Ge²,

Haynes³

et al. 1977

Reproduction

122

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Response of cyclic and post-partum suckled cows to injections of synthetic LH-RH

Webb¹,

Ge²,

Haynes³

et al. 1977

Reproduction

122

View full text Add to dashboard Cite

show abstract

“…The intra-and inter-assay coefficients of variation for plasma containing 8 ng/ml were 0.18 and 0.27, respectively. Data on cow post-partum anoestrous interval were analysed by least-squares procedures (SAS, 1987) (Hansel and Alila, 1984) and 20-110 d for taurine cattle in temperate regions (Hanzen, 1986 (Wells et al, 1985) and taurine beef cattle (Wiltbank and Cook, 1958;Short et at, 1972).…”

Section: Introductionmentioning

confidence: 99%

Influence of suckling and continuous cow-calf association on the resumption of post-partum ovarian function in Bos indicus cows monitored by plasma progesterone profiles

Mukasa-Mugerwa¹,

Tegegne²,

Franceschini³

1991

Reprod. Nutr. Dévelop.

View full text Add to dashboard Cite

“…This period is highly variable in suckled cows and lasts from 30 to 110 days (Wiltbank and Cook 1958 ;Oxenreider 1968 ;Graves et al, 1968 ;Casida et al, 1968 ; Nancarrow et al, 1977 ;Holness et al, 1978 ;Wettemann et a/., 1978 ;Short et al, 1979 ;Dunn and Kaltenbach, 1980 ;Kesler et al, 1980 ;Randel, 1981 ;Montgomery, 1982 ;Peters and Riley, 1982 . Jainudeen et al, 1982Bastidas et al, 1984 ;King and Mc Leod, 1983Leod, /1984Hansen and Hauser, 1984 ;Montgomery et al, 1985).…”

mentioning

confidence: 99%

Endocrine regulation of postpartum ovarian activity in cattle : a review

Hanzen

1986

Reprod. Nutr. Dévelop.

View full text Add to dashboard Cite

Summary. The Clinically, the postpartum period is characterized by a period of behavioural anoestrus, the duration of which differs in different breeds.If the detection of oestrus is optimal, anoestrus lasts for 20 to 70 days in dairy cows Callahan et al., 1971 ;Schams et al., 1978 ;Pirchner et al., 1983 ;Richardson et al., 1983 ;Etherington et al., 1984). This period is highly variable in suckled cows and lasts from 30 to 110 days (Wiltbank and Cook 1958 ;Oxenreider 1968 ;Graves et al., 1968 ;Casida et al., 1968 ; Nancarrow et al., 1977 ;Holness et al., 1978 ;Wettemann et a/., 1978 ;Short et al., 1979 ;Dunn and Kaltenbach, 1980 ;Kesler et al., 1980 ;Randel, 1981 ;Montgomery, 1982 ;Peters and Riley, 1982 . Jainudeen et al., 1982Bastidas et al., 1984 ;King and Mc Leod, 1983Leod, /1984Hansen and Hauser, 1984 ;Montgomery et al., 1985).Assay of progesterone in plasma or milk has shown that 88 % of animals of dairy breeds have an luteal activity present by 35 days after calving (Ball and Lamming, 1983) and 95 % within 50 days (Bulman and Lamming, 1978). According to different authors, the first rise of progesterone appears between 16 and 69 days after calving in dairy cows (Webb et al., 1977(Webb et al., , 1980Pirchner et al., 1983) and between 56 and 96 days in suckled cows (Fonseca et al., 1980 ;Peters and Riley 1982 ; Jainudeen et al., 1982 Jainudeen et al., /1983Montgomery et al., 1985).It is possible to detect ovarian follicles by rectal palpation in both milked and suckled cow from the second week after calving (Saiduddin et al., 1968 ;Callahan et al., 1971 ;Kesler et al., 1979 ;Webb et al., 1980 ;Kesler et al., 1980 ;Stevenson et al., 1983 (Wiltbank et al., 1962(Wiltbank et al., , 1964Dunn et al., 1969 ; Lammond, 1970 ;Corah et al., 1975 ;Whitman et a/., 1975 ;Duffour, 1975 ;Holness et al., 1978 ;Carstairs et al., 1980 ;Dunn and Kaltenbach, 1980 ; Gauthier and Thimonnier, 1982 ;Peters and Riley, 1982 ; Mc Leod, 1983/1984 ;Rutter and Randel, 1984). Some authors have found that overfeeding improves ovarian (Wiltbank et al., 1962(Wiltbank et al., , 1964Hansen et al., 1982) or pituitary (Beal et al., 1978 ;Jordan and Swanson, 1979 ;Lishman et al., 1979 ;Moss et al., 1982) function. Others have found no relation between feeding and the ovarian (Lishman et al., 1979 ;Carstairs et al., 1980) or pituitary (Hill et a/., 1970 ;Dunn et al., 1974 ;Spitzer et al., 1978 ;Haresign, 1981 ;Rutter and Randel, 1984) activity.Little is known about the mechanism under which diet exerts its effect. It is conceivable that feeding influences the ovarian response to gonadotropins (Gombe and Hansel, 1973). There was a positive correlation between the degree of fatness of an animal and the plasma concentration of 17 !3-oestradiol, 7 weeks after calving (Lishman et al., 1979).Feeding affects the release of luteinizing hormone (LHI and subsequent luteal function Spitzer et al., 1975 ;Apgar et al., 1975 ;Beal et al., 1978). It has been observed that the release of LH induced by gonadotropin releasing hormone (GnRH) injection was grea...

show abstract

The Comparative Reproductive Performance of Nursed Cows and Milked Cows

Cited by 106 publications

References 0 publications

Response of cyclic and post-partum suckled cows to injections of synthetic LH-RH

Response of cyclic and post-partum suckled cows to injections of synthetic LH-RH

Influence of suckling and continuous cow-calf association on the resumption of post-partum ovarian function in Bos indicus cows monitored by plasma progesterone profiles

Endocrine regulation of postpartum ovarian activity in cattle : a review

Contact Info

Product

Resources

About