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Tiersch The publisher's final edited version of this article is available at Theriogenology See other articles in PMC that cite the published article. Abstract Swordtails and platyfish of the genus Xiphophorus are valuable models for biomedical research and are also commercially raised as ornamental fish valued by aquarists. While research use and commercial interest increases yearly in these fish, cryopreservation of sperm is unexplored in this genus. Xiphophorus are live-bearing fishes characterized by small body sizes, limited sperm volumes, and internal fertilization, an atypical reproductive mode for fish. These attributes make research involving cryopreservation of Xiphophorus germplasm challenging.
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Understanding Male Infertility: Proteomic Analysis of Healthy Sperm

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Understanding Male Infertility: Proteomic Analysis of Healthy Sperm

Animal models for sperm maturation are a poor approximation of the mechanisms behind human sperm maturation. Current research is looking for biomarkers in semen that explain male infertility. However, these do not explain idiopathic male infertility where the semen profile is normal. The investigators collected semen samples from 12 men who had fathered at least one healthy child, naturally, within two years. Thus, they used a combination of pooled and individual sperm samples for their analysis.
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