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. 2011 Jan 24;13(2):225–230. doi: 10.1038/aja.2010.178

Table 3. Guidelines regarding andrology laboratory effort for successful sperm retrieval in non-obstructive azoospermia51.

  Sperm search man-hours required (h)
TESA 1–2
Simple TESE 2–4
Microdissection TESE 4–6+

Abbreviations: h, hour; TESA, testicular sperm aspiration; TESE, testicular sperm extraction.