| http://www.w3.org/ns/prov#value | - Each abstract was screened for specific key words representing inclusion criteria: DNA, fetal sex detection, Y chromosome sequences, pregnancy, blood, plasma, serum, amelogenin, and quantitative PCR. Amelogenin is a protein encoded by a gene present on both sex chromosomes but with a 6???base pair deletion on the X chromosome version (the genes are AMELX and AMELY on the X and Y chromosomes, respe
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