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. 2012 Mar 29;54(1):20. doi: 10.1186/1751-0147-54-20

Table 2.

Embryo recovery attempts, embryo recovery rates and embryo quality after Artificial Insemination (fresh extended plus frozen/thawed semen) or Natural Service

N° of Mares N° of Services Embryos/Flushing
(%)
Grade 1 Embryos/Total Embryos (%) Grade 2 Embryos/Total Embryos (%) Grade 3-4 Embryos/Total Embryos (%)
AI 4 6 4/6
(66.7)
4/4
(100)
--- ---

Natural Service 2 9 6/9
(66.7)
2/6
(33.3)
2/6
(33.3)
2/6
(33.3)