Predisposing factors include sows being weaned in poorer condition, warm days, cool nights and decreasing day lengths. There are some things you can do to minimise the risk:

• Minimise draughts and ensure any cracks in ceilings and around doors are sealed
• Increase the amount of bedding being used
• Feed sows and gilts to body condition
• Re-instate the winter feed curve
• Provide 14 to 16 hours of light per day, of a minimum of 200 lux, from the beginning of August. Install a light timer, consider introducing more lights into dark houses and wash existing bulbs. Whitewashing walls/tents will also reflect light
• Provide more physical boar contact pre- and post-service to provide ongoing support for the maintenance of pregnancy and to detect cycling sows.