Chapter 3 (Breeding System Extension) Flashcards
(14 cards)
- Swine reach puberty at about _____ months of age.
5 months
At this stage, however, boars and gilts are not yet ready for breeding. Breeding at this stage usually retards the growth and development of the animals.
Puberty
Sows and sexually mature gilts normally undergo periodic heat
periods (estrous cycle),which last from __ to __ days or an average of __ days.
18-24 or an average of 21 days
The period of sexual receptivity, called the estrus or heat period, lasts from _ to _ days.
2-5 days
Training of boar. The training of boars normally starts at around _____ months of age.
6 1/2 - 7 months
A mature boar should produce __ to ___mL sperm-rich semen per
ejaculation.
75-150mL
The sperm concentration should be at least __ B spz/ dose (100 ml). A concentration of __ B spz is recommended during summer months to compensate for lower production due to heat
stress.
3B
6B
At least __% of the sperm cells should exhibit a progressive
movement.
70%
The semen should contain at least __% normal sperm cells. Sperm cell abnormalities such as the presence of cytoplasmic droplet, curled, or coiled tail, etc. may be present, but should not exceed __% of the total sperm count.
75%
25%
Immediately after processing, refrigerate the extended semen at an ideal temperature of _____°C.
16-17°C
Extended semen should be used for AI within __ hours of storage to achieve desirable results.
48 HOURS
Insert the catheter into the vagina with the point directed slightly
upward about __° to prevent entrance into the urinary bladder.
45 DIGREE
The best time to inseminate a gilt/ sow is on the first __ hours of the estrus phase.
30 HOURS
The boar reaches puberty at around __-__ months. A boar is ready for breeding when it is ____ ____ old
The boar reaches puberty at around 4-6 months. A boar is ready for breeding when it is 8 months old
