In the case of the LIF3, greater NBA was typical for
sows of the BB genotype compared to the other sows but
only in the first parity (P < 0.01 and P < 0.05), and in the case
of the LIF1 NBA was highly significant in animals of the
AA genotype compared to sows of the BB genotype in the
first parity and in parities 2 to 4.