Table 1 : Reproductive data for sows in 101 herds farrowed in either hot and humid
(June to September) or cold seasons (December to March).


Measurements N1 Mean+SEM Range
Minimum Maximum

57,751 sows farrowed in hot and humid season

Parity 81,672 3.4+0.01 1 15
Total pigs born, pigs 81,672 12.2+0.01 1 33
Percentage of sows having stillborn piglets, % 81,672 49.6+0.17 -- --
Number of stillborn piglets, pigs2 40,539 2.0+0.01 1 22

55,705 sows farrowed in cold season

Parity 79,627 3.4+0.01 1 14
Total pigs born, pigs 79,627 12.0+0.01 1 26
Percentage of sows having stillborn piglets, % 79,627 48.8+0.18 -- --
Number of stillborn piglets, pigs2 38,857 2.0+0.01 1 25

1N represents the total number of parity records.
2Omitted data were records of sows with no stillborn piglets.

Koketsu et al.Veterinary Medicine and Animal Sciences  2016 4:3DOI : 10.7243/2054-3425-4-3