has part has part has_part characteristic of has modifier sperm abnormal gametes abnormal spermatogenesis abnormal sperm number oligozoospermia decreased sperm number oligospermia MP:0002684 reduced sperm count reduced concentration of spermatozoa in the cauda epididymis or seminal fluid reduced sperm number decreased sperm count MPheno.ontology hypospermia MP:0002687 decreased male germ cell number abnormal decreased amount