107.Aims and methods of farrowing synchronization at the pig farm

Question 1

What are the aims of synchronized farrowing?

Answer 1

Synchronized farrowing

Aims

• Labour management aspects –> we want to avoid “weekend” farrowing, or farrowing at the same time
• Max 2 to 3 days before expected term
• Oestrus normally occurs spontaneously in gilts and mature females that are not pregnant or lactating
• Once oestrus cycles have begun, they normally occur every 18-21 days

Question 2

What happens with moderate levels of oestrogen stimulate?

Answer 2

Moderate levels of oestrogen stimulate

• Increased vocalization
• Reddening and swelling of the vulva
• The secretion of mucus from the vulva that feels sticky

Question 3

What happens with high levels of oestrogen stimulate?

Answer 3

High levels of oestrogen stimulate

• The standing reflex or immobilization response
• A surge in LH secretion
• Ovulation

Question 4

Method for synchronization?

Answer 4

Methods

• We can give PGF2α, 10-15 mg im., there will be farrowing 24 hours later
• Oxytocin is more precise but more risky
• When gilts are exposed to boars between 160-180 days old

o 70-80% of gilts exhibit oestrus within the next 28 days

o 40% of gilts showing oestrus 10-14 days later

• When gilts are given PG600 and boar exposure between 160-180 days old

o 70-80% of the gilts exhibit oestrus within the next 28 days

o 800% of oestrus periods occur 5 and 10 days later