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Saturday, 20 June 2015

Semen collection

Semen collection

Semen collection refers to the process of obtaining semen from male humans or other animals with the use of various methods, for the purposes of artificial insemination, or medical study (usually in fertility clinics). Semen can be collected via masturbation (e. g., from male wolves,dogs and foxes), prostate massage, artificial vagina, penile vibratory stimulation (vibroejaculation) and electroejaculation.

Methods of semen collection from humans include:

Masturbation, directing the sample into a clean cup.This is the most common way to collect a semen sample.
Sexual intercourse in a special type of condom known as a collection condom.Collection condoms are made from silicone or polyurethane, as latex is somewhat harmful to sperm. Many men prefer collection condoms to masturbation, and some religions prohibit masturbation entirely. Adherents of religions that prohibit contraception may use collection condoms with holes pricked in them.However, such samples are inferior to the ones collected by masturbation in clean cup.
Coitus interruptus (withdrawal). With this technique, the man removes his penis from his partner near the end of intercourse and ejaculates into a wide-necked cup or bottle.

Surgical extraction, if for example a blockage in the vas deferens is suspected to impede fertility, semen can be taken directly from the epididymis. Such a collection is called per cutaneous epididymal sperm aspiration (PESA). Alternatively, the testicular tissue itself, instead of the sperm produced can be investigated. Then, the collecting method is called testicular sperm extraction (TESE). A Cochrane review found insufficient evidence to recommend any specific surgical sperm retrieval technique for men with azoospermia undergoing intracytoplasmic sperm injection (ICSI).
Penile vibratory stimulation (PVS) and electroejaculation are two other alternatives for men with anejaculation due to spinal cord injury.The penile vibratory stimulator is a plier-like device that is placed around the glans penis to stimulate it by vibration, and provides the first-line method for sperm retrieval in spinal cord injury patients with anejaculation.

The best specimen is produced when a short period of 3–5 days of abstinence is observed. More prolonged period does not yield better results.

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