Hormone Induced Lactation in the Cow. IV. Relationships between Lactational Performance and Hormone Concentrations in Blood Plasma

Erb, R.E.; Malven, P.V.; Monk, E.L.; Mollett, T.A.; Smith, Kenneth L.; Schanbacher, F.L.; Willett, L. B.

doi:10.3168/jds.s0022-0302(76)84380-9

Cited by 33 publications

(20 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…1 and 2) following estrogen-progesterone injections were of the same order of magnitude as obtained during late gestation (Terqui et al, 1975 ;Stabenfeldt, 1974) but much higher than observed at the time of estrus (Saumande and Lopez-Sebastian, 1977). Although the pattern was similar to that reported previously (Monk et al, 1973 ;Erb et al, 1976a, b) (Convey, 1974 ;Djiane et al, 1975).…”

supporting

confidence: 92%

Induced lactation in cows and heifers by short-term treatment with steroid hormones

Delouis¹,

Djiane²,

Kann³

et al. 1978

Ann. Biol. anim. Bioch. Biophys.

View full text Add to dashboard Cite

Summary. Induction of lactation following administration of estradiol-17 and progesterone for 7 consecutive days was investigated in heifers and non-lactating multiparous cows of the Friesian breed. Lactation started 14 days after the end of the treatment with steroids.Mean milk yields for 32 induced lactations were between 2 000 and 3 000 kg/300 days except for two heifers which failed to respond to the treatment (50 kg/120 days and 650 kg/ 150 days, respectively). Mean milk yield for the multiparous cows was 80 p. 100 of that produced during previous natural lactations whereas heifers produced only 60 p. 100 of milk yield recorded during natural lactations which followed the induced lactation. Milk yields during 21 induced lactations in cows and heifers and during natural lactations in the same animals were correlated (r = !-0.47, P < 0.05).Plasma concentrations of total estrogens, progesterone and prolactin revealed that mammary gland growth and lactogenesis occurred when steroid concentrations had decreased and prolactin had increased. Additional treatment with hydrocortisone acetate for 3 days, coincident with the time milking began, had a positive effect on subsequent milk yields (P < : 0.001). ).Increasing the amounts of estradiol-17 and progesterone injected did not result in greater milk yields but did result in an increase in the post-treatment frequency of cystic follicles.Ten cows and 13 heifers were inseminated during the induced lactation. One cow and one heifer failed to conceive, two heifers conceived but subsequently aborted, and the other cows and heifers conceiving showed normal pregnancy, parturition and lactation.

show abstract

supporting

confidence: 92%

Induced lactation in cows and heifers by short-term treatment with steroid hormones

Delouis¹,

Djiane²,

Kann³

et al. 1978

Ann. Biol. anim. Bioch. Biophys.

View full text Add to dashboard Cite

show abstract

“…Secretory cells should be responsive to circulating prolactin in the period days 22--28 as oestrogen and progesterone levels are then low (Erb et al 1976). It is apparent that basal prolactin levels in this period are adequate for lactogenesis.…”

Section: Discussionmentioning

confidence: 99%

“…A practical disadvantage of the oestradiol-I 7 f3 (0·1 mg/kg body weight daily) and progesterone (0·25 mg/kg body weight daily) treatment which is normally used is that these high levels of oestrogens can cause intense oestrous activity which, together with relaxed ligaments, results in physical injuries such as fractured pelves in some cows (Peel et al 1978). When above-average induced milk yields were associated with plasma hormone levels (Erb et al 1976) it was concluded that the oestradiol-I 7 f3 dose rate could probably be reduced by one-half with no deleterious effect upon milk yields. Such a reduction may also alleviate the problem of physical injuries occurring in treated cows.…”

Section: Introductionmentioning

confidence: 99%

“…Low plasma levels of prolactin in some cows can limit the yield of milk which is induced by steroid treatment (Erb et al 1976). However, reports on the effects of prolactin stimulators such as reserpine and thyrotrophin releasing hormone during the treatment period upon subsequent induced milk yields are conflicting (Mose et al 1975;Collier et al 1977;Peel et al 1978).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Use of Oestrogen, Progesterone and Reserpine in the Artificial Induction of Lactation in Cattle

Peel¹,

Taylor²,

Robinson³

et al. 1979

Aust. Jnl. Of Bio. Sci.

View full text Add to dashboard Cite

Oestradiol-17 p, progesterone and reserpine were utilized in three experiments in an attempt to improve the success rate and the magnitude of hormonally induced lactations. Onset of lactogenesis induced by steroid administration was measured by a surge in the lactose content of the mammary secretion and lactations were regarded as being successfully induced if milk yields exceeded 3 kg/day.In all experiments, the dose rate of oestradiol-17 p was standardized at the reduced level of 20 mg/day (approximately 0·05 mg/kg body weight daily), and progesterone maintained at 100 mg/day (approximately 0·25 mg/kg body weight daily) for the initial 7 days (days 1-7). The halving of the dose rate of oestradiol-17 p from the commonly used 0·1 mg/kg body weight daily eliminated the occurrence of noticeable physical injuries in the 60 animals so treated.Induced milk yields were not improved by either repeating the standard ovarian steroid treatment on days 16-22, extending the standard treatment for days 8-21 or continuing the steroid treatment at one-quarter the standard rate for days 8-21.Addition of reserpine to an oestradiol-17 p-progesterone treatment does improve the success rate of the hormonal induction of lactation. In experiment 1, 86% (n = 14) of heifers receiving reserpine were successfully induced into lactation compared to 45 % (n = 15) which were not.In experiments 2 and 3, 95 % (n = 19) of cows receiving both ovarian steroids and reserpine were successfully induced into lactation. However, when we consider only the milk yields of those cows sucessfully induced into lactation, reserpine (3 mg/day) administration on days 1, 6, 11, 16, 21 and 22-28, on days 22-28 alone, or on days 8, 10, 12 and 14 did not enhance induced yields.In one experiment all eleven cows failed to be induced into lactation and this was attributed to an inadequate dry period (25-43 days).

show abstract

“…Tal ferramenta é utilizada principalmente naquelas vacas que estão saudáveis, em boas condições clínicas e bom escore de condição corporal (ECC), mas não conseguem ficar gestantes. Estes protocolos já são relatados há muito tempo na literatura (Erb et al, 1976) e pesquisados com certa frequência (Chakriyarat et al, 1978;Byatt et al, 1996;Magliaro et al, 2004;Freitas et al, 2010;Stark et al, 2015). Entretanto, estas pesquisas concentram-se avaliação da eficiência da indução de lactação (Erb et al, 1976;Chakriyarat et al, 1978), comparação entre protocolos (Byatt et al, 1996;Freitas et al, 2010) e produção leiteira (Collier et al,1975;Magliaro et al, 2004 …”

Section: Introductionunclassified

Influência da indução artificial da lactação na saúde das vacas mestiças

Oliveira¹

View full text Add to dashboard Cite

Hormone Induced Lactation in the Cow. IV. Relationships between Lactational Performance and Hormone Concentrations in Blood Plasma

Cited by 33 publications

References 12 publications

Induced lactation in cows and heifers by short-term treatment with steroid hormones

Induced lactation in cows and heifers by short-term treatment with steroid hormones

The Use of Oestrogen, Progesterone and Reserpine in the Artificial Induction of Lactation in Cattle

Influência da indução artificial da lactação na saúde das vacas mestiças

Contact Info

Product

Resources

About