Inducing Lactational Ovulation
Inducing follicular growth and ovulation immediately postpartum with hCG leads to the formation of CL that would regress ( d13 to 14) and allow the sow to return to estrus in 21 d or CL could be lysed with PGF2? by d 12.
Ovulatory response of sows to hCG within 24 hrs postpartum has been from 41% (Kirkwood et al., 1999) to 80% (Armstrong et al., 1999) and some sows that ovulated did respond to PGF2? .
SLS was not reduced by this treatment regimen but, WEI was increased and it will only become useful if improvements are made.