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My wife an I recently found out that we're going to have a baby, and had seen something talking about this last week. Now she's a PhD student in microbiology, and tells me that this kit is just doing a PCR reaction with a simple set of primers that are, like the article states, trying to amplify DNA from a Y chromasome. She says that the primers themselves would cost about $16 from a lab supply company. Now I'm thinking that with the $10 PCR kit described earlier in the month, you could put together this test kit for under $30 and do it all in your own home and get your results in under an hour. (if the other article is correct about it's processing time for the PCR)

Presence or absence of a Y chromosome doesn't tell the whole story, as there's more genetic sexes than XX and XY. Turner's syndrome, Kleinfeldter's syndrome, androgen-insensitive XY, etc.

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