Embryo Recovery

Embryos were recovered from cattle by midventral surgery in the early days of the commercial industry. Nonsurgical recovery utilizing flexible Foley catheters replaced surgery in cattle in the late 1970s. With this technique, the uterus is repeatedly irrigated about a week after estrus, using media composed primarily of NaCl under gravity flow. In most cases, the outflow is directed

Table 1 Collection of embryos from domestic farm animals in different regions of the world in 2002

Number of recoveries (Number of embryos)

Table 1 Collection of embryos from domestic farm animals in different regions of the world in 2002

Number of recoveries (Number of embryos)

Region

Cattle

Horses

Sheep

Goats

Pigs

Africa

1,968 (12,641)

59 (48)

NAa

NA

NA

Asia

17,557 (120,951)

NA

NA

NA

30 (505)

Europe

18,294 (102,996)

115 (74)

NA

NA

NA

N. America

42,238 (265,175)

10,000b

164 (749)

151 (1,360)

NA

S. America

14,189 (90,572)

9,600b (5,520)

NA

NA

NA

Oceania

7,149 (37,352)

60 (45)

NA

NA

NA

Total

101,665 (629,687)

19,953 (10,762)

NA (110,496)c

NA (17,921)c

30 (505)

aNot available. bPartially estimated.

cBased partially on imported frozen embryos. (From Ref. 3.)

aNot available. bPartially estimated.

cBased partially on imported frozen embryos. (From Ref. 3.)

through a filter, trapping the embryos. Equine embryos are recovered similarly. Laparoscopic surgical recovery of embryos, with the donor under intravenous anesthesia, is the primary method in swine, sheep, and goats.

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