Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-27T19:25:42.608Z Has data issue: false hasContentIssue false
  • English
  • Français

Reproductive performance of gilts induced into puberty with oestradiol benzoate or a combination of pregnant mare's serum gonadotropin and human chorionic gonadotropin

Published online by Cambridge University Press:  02 September 2010

A. M. Paterson ,
G. P. Pearce ,
G. R. Foxcroft  and
H. C. B. Reed
A. M. Paterson
Affiliation:
ARC Research Group on Hormones and Farm Animal Reproduction, University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leicestershire LE12 5RD
G. P. Pearce
Affiliation:
ARC Research Group on Hormones and Farm Animal Reproduction, University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leicestershire LE12 5RD
G. R. Foxcroft
Affiliation:
ARC Research Group on Hormones and Farm Animal Reproduction, University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leicestershire LE12 5RD
H. C. B. Reed
Affiliation:
MLC Pig Breeding Centre, Selby, North Yorkshire YO8 9HL
Get access

Abstract

The efficacy of a single injection of oestradiol benzoate, or a combination of pregnant mare's serum gonadotropin (PMSG) and human chorionic gonadotropin (HCG), for the induction of a fertile oestrus and ovulation in the prepubertal pig was investigated in two experiments.

In the first experiment, 1·2 mg of oestradiol benzoate induced 21/23 gilts to ovulate, and 22/23 gilts showed oestrus and were inseminated on day 4 or 5 after treatment. At 28 days after insemination, 12 gilts were pregnant and carrying a mean of 7·1 (s.d. 3·3) live embryos, giving an embryonic survival rate of 0·703. All the 22 gilts treated with 400 international units PMSG plus 200 international units HCG as a single injection ovulated but only 10 showed oestrus and were inseminated. At 28 days after insemination, six gilts were pregnant with a mean of 13·0 (s.d. 5·8) live embryos, giving an embryonic survival rate of 0·583.

In the second experiment, 9/11 oestradiol benzoate and 10/10 PMSG/HCG gilts ovulated in response to treatment. Oestrous detection and insemination were delayed until the expected time of the second oestrus, 20 to 30 days after treatment. Nine gilts (3 oestradiol benzoate, 6 PMSG/HCG) showed oestrus in this period and eight were inseminated. Five gilts were pregnant 28 days after insemination with a mean of 11·4 (s.d. 1·1) live embryos, giving an embryonic survival rate of 0·860.

Type
Research Article
Information
Animal Production , Volume 38 , Issue 1 , February 1984 , pp. 121 - 128
Copyright
Copyright © British Society of Animal Science 1984

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Bielanski, A. 1978. [The possibilities of a reduction in the age at first farrowing.] Zesz. probl. Postep. Nauk roln., No. 196, pp. 49–54.Google Scholar
Brooks, P. H. and Cole, D. J. A. 1970. The effect of the presence of a boar on the attainment of puberty in gilts. J. Reprod. & Fen. 23: 435–440.CrossRefGoogle ScholarPubMed
Casida, L. E. 1935. Prepuberal development of the ovary and its relation to stimulation with gonadotrophic hormones. Anat. Rec. 61: 389–396.CrossRefGoogle Scholar
Haresign, W., Foster, J. P., Haynes, N. B., Crighton, D. B. and Lamming, G. E. 1975. Progesterone levels following treatment of seasonally anoestrous ewes with synthetic LH-releasing hormone. J. Reprod. & Fen. 43: 269–279.CrossRefGoogle ScholarPubMed
Hughes, P. E. 1982. Factors affecting the natural attainment of puberty in the gilt. In Control of Pig Reproduction (ed. Cole, D. J. A. and Foxcroft, G. R.), pp. 117–138. Butterworth, London.Google Scholar
Hughes, P. E. and Cole, D. J. A. 1976. Reproduction in the gilt. 2. The influence of gilt age at boar introduction on the attainment of puberty. Anim. Prod. 23: 89–94.Google Scholar
Hughes, P. E. and Cole, D. J. A. 1978. Reproduction n i the gilt. 3. The effect of exogenous oestrogen on the attainment of puberty and subsequent reproductive performance. Anim. Prod. 27: 11–20.Google Scholar
Miškovic, M, Simic, M., Jojkic, M. and Stančič, B. 1977. [Ovulation induction in prepubertal gilts using PMS+HCG.] Rad. poljopriv. Fak. Univ. Saraj. 24: 181–188.Google Scholar
Paterson, A. M. and Day, B. N. 1980. The effect of oestradiol benzoate on estrus and ovulation in prepubertal gilts. J. Anim. Sci. 51: Suppl. 1, p. 88 (Abstr.).Google Scholar
Paterson, A. M. and Lindsay, D. R. 1981. Induction of puberty in gilts. 2. The effects of boars on maintenance of cyclic activity in gilts induced to ovulate with pregnant mare's serum gonadotrophin and human chorionic gonadotrophin. Anim. Prod. 32: 51–54.Google Scholar
Paterson, A. M. and Martin, G. B. 1981. Induction of puberty in gilts. 3. Ovulation, plasma oestradiol and progesterone in gilts injected with pregnant mare's serum gonadotrophin and human chorionic gonadotrophin. Anim. Prod. 32: 55–59.Google Scholar
Polge, C., Rowson, L. E. A. and Chang, M. C. 1966. The effect of reducing the number of embryos during early stages of gestation on the maintenance of pregnancy in the pig. J. Reprod. & Fert. 12: 395–397.CrossRefGoogle ScholarPubMed
Puglisi, T. A., Rampacek, G. B., Kraeling, R. R. and Kiser, T. E. 1979. Corpus luteum susceptibility to prostaglandin F2a (PGF2a )luteolysi s in hysterectomized prepuberal and mature gilts. Prostaglandins 18: 257–264.Google Scholar
Reed, H. C. B. 1982. Artificial insemination. In Control of Pig Reproduction (ed. Cole, D. J. A. and Foxcroft, G. R.), pp. 65–90. Butterworth, London.CrossRefGoogle Scholar
Schilling, E. and Cerne, F. 1972. Induction and synchronisation of oestrus in prepuberal gilts and anoestrous sows by a PMS/HCG-compound. Vet. Rec. 91: 471–474.CrossRefGoogle ScholarPubMed
Schlegel, W., Wahner, M. and Stenzel, S. 1978. Studies into the further course of the cycle following biotechnical induction of puberty in gilts. Mh. VetMed. 33: 85–87.Google Scholar
Shaw, G. A., McDonald, B. E. and Baker, R. D. 1971. Fetal mortality in the prepuberal gilt. Can. J. Anim. Sci. 51: 233–236.CrossRefGoogle Scholar
Stickney, K. 1982. The physiology of oestrogen-induced puberty in the gilt. Ph.D. Thesis, Univ. Nott.Google Scholar