frozen semen

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frozen semen

Semen collected, analyzed and stored at −196°F (−90°C) for future use in artificial insemination by clinics specializing in infertility. In artificial insemination the number of successful pregnancies is lower with frozen semen than with fresh.
See also: semen


said of material kept at less than 0°C. Biological materials are frozen solid because of their high water content.

frozen embryo
see embryo transfer.
frozen meat
meat preserved at low temperatures in a freezer.
frozen section
a specimen of tissue that has been quick-frozen, cut by microtome, and stained immediately for rapid diagnosis of possible malignant lesions. A specimen processed in this manner is not satisfactory for detailed study of the cells, but it is valuable because it is quick and gives the surgeon immediate information regarding the malignancy of a piece of tissue.
frozen semen
see semen.


fluid discharged at ejaculation in the male, consisting of spermatozoa in their nutrient plasma, secretions from the prostate, seminal vesicles and various other glands, epithelial cells and minor constituents.

semen collection
for artificial insemination or laboratory evaluation or examination in a clinicopathological sense. Done by artificial vagina, electroejaculation, genital massage.
semen concentration
the number of spermatozoa per ml in the ejaculate.
semen diluent
there are a number of suitable diluents with some preference being given to one or other of them in each species. There are also different diluters for chilled liquid semen as distinct from frozen semen. Most diluters are based on biological fluids such as whole or skim milk, buttermilk, cream and egg yolk. The general cryoprotectant for freezing is glycerol. Called also semen extender.
semen extender
see semen diluent (above).
frozen semen
semen stored in liquid nitrogen at −196°C (−321°F).
semen non-sperm portion
see semen pre-sperm fraction (below).
semen pre-sperm fraction
the accessory gland fluid emitted at the beginning of ejaculation.
semen samples
part of an ejaculate collected for laboratory examination.
semen sperm-rich fraction
the portion of the ejaculate containing most of the spermatozoa.
semen stones
concretions of amorphous cellular debris and clumps of nuclear material found in seminal vesicles of bulls.
semen storage
chilled bull semen stored at 5°C can be stored and used for 5 days; frozen bull semen (−79°C using dry ice or −196°C using liquid nitrogen) can be stored and used successfully for up to 10 years, with only a small drop in fertility after 40 years.
References in periodicals archive ?
Refrigerated or frozen semen with predetermined sperm concentration may be used, but the refrigerated aliquots should not be stored for more than one month.
Controls include photographs of round cells or frozen semen stock containing round cells to be stained.
Semen volume (ml); AD = Age at disposal (d); AFSC = Age at first semen collection (d); AFSF = Age at first semen freezing (d); FSPP = Frozen semen production period (d); SPP = Semen production period (d); ALSC = Age at last semen collection (d); ALSF = Age at last semen freezing (d) and IM = Initial motility.
But we discussed it at length and we just can't keep another stallion, so Susan and I negotiated and I shall have some frozen semen straws sent here as part of the deal,' added Ann, who hopes to have a filly foal next year.
We could more easily use frozen semen from breeds around the world to incorporate desirable genes into our flocks here.
Idant Laboratories, Daxor's subsidiary, started the first personal frozen blood storage programs and one of the first frozen semen storage centers.
Browne was the only Irish breeder to use his frozen semen in 2010, on Mercury Queen (Larkhill Jo-The Other Sony), who duly threw a litter of seven headed by Coolavanny Bert.
Improvement of frozen semen quality of Garut Sheep through the addition of alpha -tocopherol into yolk egg-skim milk diluent.
Table 1-5 Imports of Cattle, Frozen Semen and Embryos 11
Glenwood Stud is a Defra approved semen collection centre for chilled/frozen semen and the storage and export of frozen semen.
Ms Griffiths added, 'The results of the 103 flocks inseminated during the autumn of 2004 were very encouraging, with a conception rate of 78% from frozen semen.
Until this year, Shatner had honoured this agreement by providing Lafferty with semen in "fresh cooled format" (as you do) but this season he switched to frozen semen.