Swine Production Lecture 13 - Breeding and Gestation

reddening/swelling of vulva

mucous discharge

external anatomical changes that occur when a sow is in heat

angle rod upward

twist into cervix

inseminate

process of AI in sows

first and last 30 days

2 critical periods of gestation

fertilization

day 0

embryonic migration

day 1-12

maternal recognition of pregnancy

day 11-13

implantation

day 14-30

rapid piglet growth

day 90-114

43%

percentage of fetuses lost during gestation

1/3

fraction of fetal loss in the first 30 days of pregnancy

stress reduction management

gestation management =

60-68

ideal temperature for pregnant sows

indoor and outdoor

solid floor

15 ft/sow

features of open fronted facilities

increased control

decreased labor

land efficiency

benefits of enclosed facilities

no aggression

regulate feed intake

AI friendly

easier observation

features of individual stalls

fighting

feeding primary issue

major cost concern

features of group pens

PRRS

SMEDI

major diseases during gestation

blue coloration

late-term abortions

poor offspring w/ labored breathing

clinical signs of PRRS

vaccination

eliminate from herd

biosecurity

prevention of PRRS

stillbirth, mummies, embryonic death, infertility

SMEDI

often results from porcine parvovirus