Page 7 of articles about AI - artificial insemination

We should be cautious when setting the number of sperm per insemination dose, so the urge to reduce it does not make us use a number that is under the fertility threshold. Something that may be productive and/or profitable for a certain farm may not be so for another farm.

There is an unusual increase of the returns-to-oestrus at 31-39 days. The majority are due to sows previously negative to the pregnancy ultrasound testing, and the returns-to-oestrus happened before 42 days.

PCV2 vaccination of the gilts prior to insemination with PCV2 spiked-semen showed a clear decrease of viral load in the gilts as well as a much lower viral excretion that were compatible with foetus protection.

The goal of this trick is to create a register of the coming into heat of the gilts that can be interpreted quickly and easily, and to control the day of the beginning of the treatment with altrenogest when we wish to delay their mating/service.

Novel cryopreservation methods and containers are designed to increase semen cryosurvival without disturbing production of conventional liquid semen doses. This provides opportunities for gene banking and preserved fertility when inseminated deep intra uterine, alongside undisturbed commercial AI-dose production.

The goal is to identify the number of returns to oestrus of the sows quickly and at a glance using coloured pegs.

A very simple system for monitoring the heats of replacement gilts that consists of putting them ear tags at each of the two heats during the quarantine period.

The goal is to inseminate quickly the sows after the first stimulus by the boar, but keeping the stimulation.

The author considers which is the ideal day for the mating and sets out the improvements in the results obtained when weaning on Monday.