. 2018 Sep 18;50:46. doi: 10.1186/s12711-018-0417-7

Table 6.

Effect of sow parity on traits at the sow level

Parity	1	2	3	4	5	6 +
PROP IUGR	0.19 ± 0.01^c	0.12 ± 0.01^a	0.12 ± 0.01^a	0.16 ± 0.01^b	0.16 ± 0.01^b	0.16 ± 0.01^b
Ave BWT	1371 ± 25^a	1552 ± 24^a	1552 ± 24^a	1501 ± 24^b	1522 ± 25^ab	1508 ± 24^ab
SD BWT	241 ± 6^a	271 ± 6^c	281 ± 7^c	303 ± 7^b	308 ± 8^bc	317 ± 7^bc
LITTER SIZE	13.5 ± 0.27^ab	13.4 ± 0.27^ab	13.3 ± 0.29^ab	14.2 ± 0.29^c	13.9 ± 0.32^bc	13.1 ± 0.31^a
PROP SURV	0.90 ± 0.01^b	0.90 ± 0.01^b	0.91 ± 0.01^b	0.89 ± 0.01^ab	0.90 ± 0.01^ab	0.88 ± 0.01^a
GL	114.9 ± 0.11^a	115.0 ± 0.10^a	115.0 ± 0.11^a	115.0 ± 0.11^a	114.9 ± 0.12^a	115.1 ± 0.11^a

PROP IUGR = proportion of piglets with an IUGR head morphology within a litter

AVE BWT = average birth weight within a litter

SD BWT = within-litter standard deviation in birth weight

LITTER SIZE = litter size

PROP SURV = proportion of a litter surviving to processing

GL = gestation length

All standard errors (± SEM) are from a 6-variate model

Within a line in the table, mean values that share a common character in superscript (a, b and c) do not differ significantly (P > 0.05)