Studies on factors affecting superovulation and embryo transfer in Hungarian Merino ewes

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The objectives of this study were (a) to assess the ovulatory response and embryo production of Hungarian Merino ewes after superovulation, (b) to investigate the factors influencing the efficiency of embryo transfer (ET) in Hungarian Merino ewes, (c) to compare the results of two ovarian stimulation protocols (PMSG and PMSG+FSH treatment) in Hungarian Merino ewes, and (d) to study how superovulation, laparoscopic insemination and surgical embryo retrieval (ER) affect the subsequent reproduction of Hungarian Merino donor females after an ET programme. There was no significant difference between the ovarian stimulation protocols in the ratio of donor ewes responding to superovulation nor in the average number of corpora lutea. However, the number of transferable embryos recovered per donor ewe was higher in the PMSG+FSH group. The proportion of transferable embryos, unfertilised oocytes and degenerated embryos did not differ between the treatment protocols. The total pregnancy rate was 53.4% (179/335). Neither the developmental stage of the embryo nor the number of transferred embryos affect the implantation of embryos. However, the increased number of transferred embryos positively influenced the pregnancy rate. No difference was found in the pregnancy rate between synchronised and non-synchronised groups of recipients. Thirty-six out of 45 donor ewes (80%) became pregnant within one year after the ET programme, indicating that ovarian stimulation and surgical ER did not affect adversely their reproduction.

Original languageEnglish
Pages (from-to)431-441
Number of pages11
JournalActa Veterinaria Hungarica
Volume49
Issue number4
DOIs
Publication statusPublished - 2001

Fingerprint

Superovulation
superovulation
Embryo Transfer
embryo transfer
Merino
ewes
embryo (animal)
Embryonic Structures
Ovulation Induction
Pregnancy Rate
pregnancy rate
Reproduction
embryo implantation
Insemination
Corpus Luteum
Clinical Protocols
corpus luteum
insemination
Oocytes
oocytes

Keywords

  • Embryo developmental stages
  • Embryo transfer
  • Oestrus synchronisation
  • Superovulation

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Studies on factors affecting superovulation and embryo transfer in Hungarian Merino ewes. / Cseh, S.; Solti, L.

In: Acta Veterinaria Hungarica, Vol. 49, No. 4, 2001, p. 431-441.

Research output: Contribution to journalArticle

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