Cryopreservation of donor samples and donor sample services is the most important activity of sperm bank almost 30% of couples show very severe degree of male infertility. Very strict selection critectria should be used in selection of donors. Screening and quality control to make the procedure effective and safe.
As far donor as donor insemination is concern let use few worlds about “ fresh vs Frozen semen “ in the past Fresh semen was routinely used in therapeutic donor insemination. However with recent increase in HIV incidence and other sexually transmitted diseases the of Fresh semen is discouraged in most developed countries. The main reason being that one time screening for HIV, HBsAg etc is not sufficient to rule out the presence of these infectious agents .it can take more than three months for the donor ‘s antibodies to be detected using the present available techniques. Thus to ensure safe samples semen has to be quarantined for at least three months after which the donor is retested before release of samples.
Many Doctor believe that frozen semen is less effective than fresh semen because cryopreservation of the semen result in diminished motility and viability but it is a wrong belief with considerable afforts techniques now frozen semen show more than 80% motility of the sperm cells. ADVATAGE OF CROPRESERVED SAMPLE
1 . quarantine sample with appropriate testing.
2 . Ease of scheduling insemination when ovulation is optimal.
3 . Availability of consistent quality of sample .
4 . Advance matching of donors physical data with husband.
5 . Multiple insemination in a given cycle or in same with the same donors samples possible.
6 . Commercial & 24 hours availability.
Duration of storage dose not effect sperm survival oldest sample to produce successful pregnancy after 18 years of storage was recorded in CECOS the sperm bank in France . warming rates also denote affect sperm survival much.
In India now a days awareness has come in couples. There are few banks in some metropolitan cities due to this & no strict guidelines for screening of donors & regulating authority the common practice is to select a donor on the basis of this qualification or looks “ or others” often the semen samples sent to a pathologist for analysis are sold after analysis.
Recently one guideline from the Indian council of medical research has been polished in favour of the patients & they have given national guidelines for accreditation, supervision and regulation of ART clinics in India. We hope this article will help you in Assisted reproductive techniques “Donor sample At door Step Delivery Available”