Small day 8 equine embryos cannot be rescued by a less advanced recipient mare uterus
| Autor: | Cuervo-Arango, J, Claes, A N, Stout, T A E, LS Voortplanting Inwendige Ziekten, dES/dFAH FR, LS Klinische Reproductie |
|---|---|
| Přispěvatelé: | LS Voortplanting Inwendige Ziekten, dES/dFAH FR, LS Klinische Reproductie |
| Rok vydání: | 2018 |
| Předmět: |
endocrine system
animal structures Reproductive Techniques Assisted Uterus Embryo diameter Embryonic Development Biology Horse Andrology 03 medical and health sciences 0302 clinical medicine Food Animals medicine Animals Horses Small Animals Cell Size Pregnancy 030219 obstetrics & reproductive medicine Equine 0402 animal and dairy science Embryo 04 agricultural and veterinary sciences Early embryonic loss medicine.disease Embryo Mammalian 040201 dairy & animal science medicine.anatomical_structure Increased risk Embryonic Loss Logistic Models Embryo-donor asynchrony embryonic structures Animal Science and Zoology Female Recipient mare Estrus Synchronization Embryo quality |
| Zdroj: | Theriogenology, 126, 36. Elsevier |
| ISSN: | 1879-3231 0093-691X |
| Popis: | Equine embryos tolerate an unusually large degree of negative uterine asynchrony (recipient mare up to 5 days behind the donor mare). By contrast, positive asynchrony of more than 2 days results in a high incidence of early embryonic loss (EEL). Day 8 embryos range in diameter from approximately 130-1300 μm, with embryos smaller than 300 μm reported to suffer an increased incidence of EEL. However, it is not known whether this reduced viability is due to intrinsically poor embryo quality, or to inadvertent recipient uterine stage-embryo (positive) asynchrony. To examine whether small embryos survive better in Day 4-5 recipients than in recipients with a more advanced uterine stage, the likelihood of pregnancy (PR) and EEL for 62 small ( 0.1). The EEL for small embryos transferred into Day 4-5, 6-7 and 8-9 recipients was 20.8, 18.7 and 25.0%, respectively. We conclude that embryos recovered on Day 8 with a diameter |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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