Tonn, S.; Groothius, P.; Boese, B.; Blair, R.; Davis, D.L.
(Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 1994)
The problem of reduced reproductive performance in sows weaned at 5 to 11 days (early weaned) after farrowing was assessed
by comparing estrous and embryonic traits in
these sows and others weaned at 23 to 31 days ...