In the normal male reproductive tract, sperm exiting the testis have minimal motility and limited egg fertilizing capacity. Sperm acquire the potential for improved motility and fertilizing ability during epididymal transit. So, in the unobstructed epididymis, sperm of optimal quality as evaluated by percent motile cells are found in the most distal epididymis. The obstructed epididymis shows the opposite pattern of sperm quality: optimal sperm quality in the proximal epididymis and very poor quality in the most distal segments. This finding of "inverted motility" is expected in the obstructed male reproductive tract since sperm production continues in the testis and reabsorption of those sperm is an active process in the most distal regions of the system.
Sperm Extraction & Retrieval | ICSI | Micro TESE | San Diego, California
Males considering this option are required to see a urologist prior to surgery to assist with determining the best approach for retrieving sperm including:. MESA collects sperm by aspirating fluid from the epididymis of the male reproductive tract. A fine needle is inserted through the scrotum into the epididymis and sperm are obtained by gentle suction. This procedure is used for cases of obstructive azospermia.
Surgical sperm retrieval happens to be a large part of my practice. Patients who want to conceive a pregnancy after vasectomy have essentially two options; Vasectomy reversal, or surgical sperm retrieval. Both options are outpatient procedures, though retrieval is typically faster and involves a somewhat easier recovery.
After egg retrieval, using a glass needle, a single sperm is selected by and injected into the egg. This often enhances fertilization to help couples conceive when the man has low sperm concentration, motility, or abnormal shapes. The Follas Center of Reproductive Medicine, our adjacent office-based facility, has state-of-the-art equipment to offer this option to our patients undergoing IVF.