PMID- 19724245 OWN - NLM STAT- MEDLINE DCOM- 20091028 LR - 20211020 IS - 1940-087X (Electronic) IS - 1940-087X (Linking) IP - 31 DP - 2009 Sep 1 TI - Fluorescence in situ hybridization (FISH) protocol in human sperm. LID - 1405 [pii] LID - 10.3791/1405 [doi] AB - Aneuploidies are the most frequent chromosomal abnormalities in humans. Most of these abnormalities result from meiotic errors during the gametogenic process in the parents. In human males, these errors can lead to the production of spermatozoa with numerical chromosome abnormalities which represent an increased risk of transmitting these anomalies to the offspring. For this reason, the technique of fluorescence in situ hybridization (FISH) on sperm nuclei has become a protocol widely incorporated in the context of clinical diagnosis. This practice provides an estimate of the frequencies of numerical chromosome abnormalities in the gametes of the patients that seek for genetic reproductive advice. To date, the chromosomes most frequently included in sperm FISH analysis are chromosomes X, Y, 13, 18 and 21. This video-article describes, step by step, how to process and fix a human semen sample, how to decondense and denature the sperm chromatin, how to proceed to obtain sperm FISH preparations, and how to visualize the results at the microscope. Special remarks of the most relevant steps are given to achieve the best results. FAU - Sarrate, Zaida AU - Sarrate Z AD - Unitat de Biologia Cellular (Facultat de Biociencies). FAU - Anton, Ester AU - Anton E LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Video-Audio Media DEP - 20090901 PL - United States TA - J Vis Exp JT - Journal of visualized experiments : JoVE JID - 101313252 SB - IM MH - *Chromosomes, Human MH - Humans MH - In Situ Hybridization, Fluorescence/*methods MH - Male MH - Spermatozoa/chemistry/*ultrastructure MH - Tissue Fixation/methods PMC - PMC3150054 EDAT- 2009/09/03 06:00 MHDA- 2009/10/29 06:00 PMCR- 2011/09/01 CRDT- 2009/09/03 09:00 PHST- 2009/09/03 09:00 [entrez] PHST- 2009/09/03 06:00 [pubmed] PHST- 2009/10/29 06:00 [medline] PHST- 2011/09/01 00:00 [pmc-release] AID - 1405 [pii] AID - 10.3791/1405 [doi] PST - epublish SO - J Vis Exp. 2009 Sep 1;(31):1405. doi: 10.3791/1405.