Artificial induction of lactation in cattle: Effect of modified treatments on milk yield, fertility, and hormones in blood plasma and milk

Jordan, Diane L.; Erb, R.E.; Malven, P.V.; Callahan, C. J.; Veenhuizen, E. L.

doi:10.1016/0093-691x(81)90016-9

Cited by 14 publications

(11 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Milk production per unit of parenchyma was similar to that observed in postpartum lactations (Fowler et al, 1991). Jordan et al (1981) observed that concentrations of estrogen and progesterone in the milk produced by cows hormonally induced into lactation were similar to those in the milk of postpartum cows. They also reported that induced cows had lower plasma bST concentrations than postpartum cows.…”

Section: Introductionsupporting

confidence: 74%

“…The cows in this study increased in milk yield slowly and did not attain peak production until 125 ± 47 d of milking. Previous studies on induced lactation have also demonstrated this gradual increase in milk yield and longer time to peak production Schanbacher, 1973, 1974;Collier et al, 1975;Erb et al, 1976;Collier et al, 1977;Bel Isle and Swanson, 1978;Kensinger et al, 1979;Jordan et al, 1981;Fowler et al, 1991). It appears that cows induced into lactation make the transition from the dry to lactating state easily, with little difficulty maintaining adequate feed intake.…”

Section: Discussionmentioning

confidence: 59%

“…The conception rate for the induced cows was quite impressive given their past reproductive history. Others (Smith and Schanbacher, 1973;Collier et al, 1975;Erb et al, 1976;Fulkerson, 1978;Jordan et al, 1981;Lembowicz et al, 1982) have also reported successful breeding in induced cows and heifers that had previously failed to conceive. Collier, Bauman, and Hays (1975) reported that 9 of 16 induced animals resumed normal ovarian activity, and 5 of these 9 conceived.…”

Section: Discussionmentioning

confidence: 97%

See 2 more Smart Citations

Induced Lactation in Nonpregnant Cows: Profitability and Response to Bovine Somatotropin

Magliaro

Kensinger

Ford

et al. 2004

Journal of Dairy Science

View full text Add to dashboard Cite

Significant culling of high-producing cows with low fertility reduces profitability of dairy farms as those cows are replaced with heifers. Induced lactation of nonpregnant cows may be a management alternative to reduce culling and increase profits. The objectives of this study were to evaluate the efficacy of bovine somatotropin (bST) to increase milk production in cows induced into lactation with estrogen plus progesterone, and to determine the profitability of inducing cows into lactation vs. using replacement heifers entering the herd as first-lactation cows. Parity 1 or greater, nonpregnant, healthy Holstein cows (n = 28) were induced into lactation by administration of estradiol-17beta (0.075 mg/kg of body weight [BW] per d) and progesterone (0.25 mg/kg of BW per d) for 7 d. Milking began on d 18. Cows were randomly assigned to control or bST treatment groups on d 37 +/- 20 of milking, and milk production was compared for 70 d. After the 70-d comparison, all cows received bST for the duration of lactation. Cows receiving bST produced more milk (28.4 kg/d) than controls (24.1 kg/d), with variable yields among cows. For the economic analysis, induced cows were compared to first-lactation cows in the same herd using fair market value for costs and multiple component pricing for milk. Net present value for an induced cow (1966 dollars) was significantly greater than that for a first-lactation cow (1446 dollars). Our data suggest that bST use in induced cows is profitable. If a reliable method were developed and approved by the FDA, inducing nonpregnant cows into lactation could be used by dairy producers to increase profitability.

show abstract

Section: Introductionsupporting

confidence: 74%

Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 97%

See 1 more Smart Citation

Induced Lactation in Nonpregnant Cows: Profitability and Response to Bovine Somatotropin

Magliaro

Kensinger

Ford

et al. 2004

Journal of Dairy Science

View full text Add to dashboard Cite

show abstract

“…Macrina et al (2011) observed a peak milk production range of 17 to 31 kg/d and total lactation milk yield range of 1,633 to 8,418 kg for heifers induced into lactation at 15 mo of age. Inconsistent or no milk yield responses were observed following administration of dexamethasone (Peel et al, 1978), reserpine (Collier et al, 1977;Peel et al, 1978), placental lactogen (Byatt et al, 1997), or thyrotropin-releasing hormone (Jordan et al, 1981). In contrast, bST treatment has been shown to reliably increase milk production during induced lactation, both in cows (Magliaro et al, 2004) and in heifers (Macrina et al, 2011).…”

mentioning

confidence: 98%

Effect of bovine somatotropin administration during induction of lactation in 15-month-old heifers on production and health

Macrina

Kauf²,

Kensinger³

2011

Journal of Dairy Science

View full text Add to dashboard Cite

Lactation can be induced successfully in 15-mo-old dairy heifers. Treatment of heifers induced into lactation with bovine somatotropin (bST) during an established lactation improved milk production; however, milk yields were still variable. The objective of the present study was to evaluate whether starting bST treatment during induction of lactation, rather than after lactation was established, would improve milk production beyond that of heifers induced into lactation but not treated with bST. Healthy Holstein heifers (n=32, 15 mo of age, 420±28 kg of body weight) were induced into lactation with subcutaneous injections of estradiol (0.075 mg/kg of body weight per d) and progesterone (0.25 mg/kg of body weight per d) for 7 d. Bovine somatotropin (500 mg) was administered to heifers (n=16) beginning on experimental d 1 along with the estrogen/progesterone treatment. Heifers continued to receive bST every 2 wk for 10 wk. Control animals (n=16) received no bST during this time. Milking began on experimental d 18, and milk production was compared through 53 d in milk (experimental d 70). Mean daily milk yield was 36% higher for bST-treated heifers than for control animals. A 15.5% difference in milk production between the groups was sustained through 305 d of lactation, even after control animals began bST treatment at 54 d in milk. Milk fat percentage was similar in bST and control heifers. Milk protein percentage was lower in bST-treated heifers (3.58%) compared with controls (3.99%) during the treatment comparison period and for the remainder of lactation (bST 3.25%, control 3.39%). Heifers treated with bST produced more total milk fat and protein compared with controls during the treatment comparison period. Throughout the induced lactation, heifers gained 0.87 kg/d and averaged 2.4 services/pregnancy; 30 became pregnant. Four heifers were culled during the induced lactation, and 28 heifers calved at 27.6±2.0 mo of age for a second lactation. Addition of bST to the lactation induction protocol was advantageous because it stimulated greater milk production.

show abstract

“…Some authors have reported successful breeding in induced cows and heifers that had previously failed to conceive (Jordan et al, 1981;Magliaro et al, 2004), thus, protocols for estrous synchronization could be suitable to improve fertility of cows induced into lactation. The objective of this experiment was to compare the reproductive performance between pluriparous cows induced to lactation and subjected to ovsynch and heatsynch protocols for estrous synchronization.…”

Section: Introductionmentioning

confidence: 99%

Reproductive Performance of Cows Induced into Lactation and Subjected to Ovsynch or Heatsynch Protocols for Estrous Synchronization

Leyva

Mellado

2009

Journal of Applied Animal Research

View full text Add to dashboard Cite

Artificial induction of lactation in cattle: Effect of modified treatments on milk yield, fertility, and hormones in blood plasma and milk

Cited by 14 publications

References 36 publications

Induced Lactation in Nonpregnant Cows: Profitability and Response to Bovine Somatotropin

Induced Lactation in Nonpregnant Cows: Profitability and Response to Bovine Somatotropin

Effect of bovine somatotropin administration during induction of lactation in 15-month-old heifers on production and health

Reproductive Performance of Cows Induced into Lactation and Subjected to Ovsynch or Heatsynch Protocols for Estrous Synchronization

Contact Info

Product

Resources

About