HSFY1 and oligospermia: Subsequent SNP array analysis of amniocytes revealed a 2.3 Mb genomic gain in Yq11.221q11.222 (encompassing one OMIM gene) and a 6.1 Mb genomic loss in q11.222q11.23 (containing AZFb and AZFc) encompassing 20 OMIM genes, including HSFY1, PRY, and DAZ1, which can cause oligospermia and infertility in men (Figure 3C).