Influence of Intrauterine Fluid Detection, Number of Transfers and Age of the Recipient on Pregnancy Rate and Early Embryonic Loss in a Commercial Embryo Transfer Program
Articolo
Data di Pubblicazione:
2023
Abstract:
The selection of the recipient mare is one of the most important factors involved in the
success of equine embryo transfer. The aim of this study was to determine whether the age of the
recipient, the number of transfers and the detection of intrauterine fluid during the follicular phase
or after ovulation can affect pregnancy rate at 14 and 45 days (PR 14 and PR 45) or early embryonic
loss (EEL). A total of 1222 ETs were included in the study. Mares receiving the first embryo of the
year had a higher PR 14 and 45 days compared to mares at the third transfer (78.8% and 70.1% vs.
65.6% and 54.1%, respectively). The detection of intrauterine fluid post ovulation negatively affected
PR 14 (60.5% vs. 77.6%) and should therefore be considered an abnormal finding, probably being a
sign of uterine inflammation or delayed uterine clearance. On the contrary, the age of the recipient
mare and detection of fluid during follicular phase did not affect PR 14. Only the age of the recipient
mare influenced the EEL, since mares aged 10–13 years had a higher EEL compared to mares aged
3–5 years (15.6% vs. 6.4%). Embryo size and grade affected PR 14 and 45.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
mare; subfertility; embryo transfer; early embryonic loss; endometritis; age
Elenco autori:
Donato, GG; Necchi, D; Vandaele, H; Vita, ME; Bertero, A; Vincenti, L; Nervo, T
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