Sperm Retreival Techniques(TESA,MESA,PESA,TESE)


When sperm cannot move through the male genital tract due to an uncorrectable blockage, sperm can be extracted directly from the epididymis or the testicle by microsurgical techniques. Congenital absence of the vas deferens or seminal vesicles, failed vasovasostomy or epididymovasostomy are all conditions where MESA might be used. Usually performed as an outpatient procedure, MESA can provide sperm for in vitro fertilization cycles. Epididymal sperm are usually not fully motile and, therefore, cannot be inseminated into the uterus or cervix successfully without sophisticated techniques that place the egg and sperm in direct contact so fertilization can occur. If MESA is done in conjunction with an IVF cycle, it will be performed around the same time as egg retrieval from the female partner. Sperm obtained from the epididymis are usually placed directly into the egg.


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