Synchronisation of females

1	Animals not cycling or ovulating
	Inject with PG600 (a combination of 400 iu eGH and 200 iu hCG - equine and human chorionic gonadotrophin)
	Ovulation will usually occur 100 to 120 hours when administered at weaning
2	Cyclic animals
	12-14 days after last oestrus
	PGF2a (prostaglandins) only work in pigs in mature corpora lutea after 12-14 days after ovulation. The female cycles 4 days after administration
	Other times
	In normal cycling females ovarian activity can be suppressed by administrating oral active progesterone, by the feeding of 15-20 mg of altrenogest (Regumate/Matrix) for 14 to 18 days. Cease feeding and oestrus occurs some 2-8 days after last feeding
	Aborting early pregnant animals
	Gilts can be served when the cycle and then the group can be synchronised by aborting the gilts as a group using prostaglandins. The gilts cycle 4 days after aborted.
3	Delay after weaning
	This may be useful to coordinate pig flow. Feed altrenogest (Regumate/Matrix) from weaning until 4 days before required heat. Note normal variation in response is same as weaning ie 2-8 days with a peak at 4 to 5 days

To help sows and gilts to come into heat

Combination of PGF2 _α and PG600

Group of synchronised animals with poor or no heats:

Day 1 Inject with PGF2 _α prostaglandin

Day 3 inject with PG600

Rational:

A group of animals cycling out of sequence will have animals at all stages of the oestrus cycle

Those 12 – 18 days will cycle 4 days later with PGF2_α

Those at 18-21 days will cycle within the next 4 days anyway

Those at 0-12 days may cycle with PG600 in 4-5 days

PG600 to animals at or about ovulation will enhance the ovulation process.