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Testing sperm motility at home just became easy

Existing at-home male fertility tests are usually limited to counting the number of sperm in a sample. Another important characteristics – mostly measured only in labs is sperm motility, or how energetic the sperm cells are when moving around. A solution may be near. Researchers at Brigham and Women’s Hospital and Massachusetts General Hospital have developed an automated system that measures the concentration of sperm cells and their motility using a smartphone and cheap snap-on components.

More than 45 million couples worldwide grapple with infertility, but current standard methods for diagnosing male infertility can be expensive, labor-intensive, and require testing in a clinical setting, the Harvard Gazette writes. Cultural and social stigma, and lack of access in resource-limited countries, may prevent men from seeking an evaluation.

To get around this problem, investigators at Harvard-affiliated Brigham and Women’s Hospital (BWH) and Massachusetts General Hospital (MGH) developed a home-based diagnostic test that could be used to measure semen quality with a smartphone-based device. New findings by the team indicate that the analyzer can identify abnormal semen samples based on sperm concentration and motility criteria with approximately 98 percent accuracy. The finding have been published online in Science Translational Medicine.

###Testing Sperm###

Simple, affordable sperm test

“We wanted to come up with a solution to make male infertility testing as simple and affordable as home pregnancy tests,” said Hadi Shafiee, a principal investigator in the Division of Engineering in Medicine and Renal Division of Medicine at BWH. “Men have to provide semen samples in these rooms at a hospital, a situation in which they often experience stress, embarrassment, pessimism, and disappointment. Current clinical tests are lab-based, time-consuming, and subjective. This test is low-cost, quantitative, highly accurate, and can analyze a video of an undiluted, unwashed semen sample in less than five seconds.”

The analyzer consists of an optical attachment that can connect to a smartphone and a disposable device onto which a semen sample can be loaded. The test utilizes the advancements in consumer electronics and microfabrication. A disposable microchip with a capillary tip and a rubber bulb is used for simple, power-free semen sample handling. The team also designed a user-friendly smartphone application that guides the user through each step of testing, and a miniaturized weight scale that wirelessly connects to smartphones to measure total sperm count.

98 percent accuracy

The research team collected and studied 350 clinical semen specimens at the MGH Fertility Center. Overall, the smartphone-based device was able to detect abnormal semen samples based on WHO thresholds for sperm concentration and motility (sperm concentration less than 15 million sperm/ml and/or sperm motility less than 40 percent) with an accuracy of 98 percent. The team also evaluated how well both trained and untrained users performed the test using the smartphone-based device.

John Petrozza, a co-author of the study and director of the MGH Fertility Center says the ability to bring point-of-care sperm testing to the consumer, or health facilities with limited resources, is a true game-changer.  “More than 40 percent of infertile couples have difficulty conceiving due to sperm abnormalities and this development will provide faster and improved access to fertility care. By working with Dr. Shafiee and his lab at BWH, and utilizing our clinical fertility expertise here at MGH, we have really been able to create a product that will benefit a lot of people.”

The smartphone-based analyzer for semen analysis is currently in a prototyping stage. The team plans to perform additional tests and will file for FDA approval. But Shafiee’s team, which focuses on developing new technologies using microfluidics, already sees many applications for the technology.

  1. The device could be used by men who have had a vasectomy. Usually, men must go for office visits with a urologist for several months after the surgery to ensure that the operation was successful; the new test may allow them to be monitored at home.
  2. The test could also be used by animal breeders to confirm the quality of a sample. Beyond semen analysis, the device is also compatible with testing blood and saliva samples.

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