Gonadotropin Treatment (PG 600®)
Inject sows with 5 mL PG 600® (200 IU hCG + 400 IU eCG) at weaning (Saoulidis et al., 1995; Kirkwood et al., 1998; Estienne & Hartsock, 1998) or the day after weaning (Kirkwood & Giebelhaus, 1998).
Only inject high risk sows:
- primiparous sows (P1s)
- those with the shortest lactations of the group
- those that fail to return by 7 d postweaning; earlier insemination (Bracken et al., 1999)?
Economics (PG 600® $3.75 to 4.50/dose)
- is the anestrus & extended WEI a big enough problem in to justify the product cost?