phenotype affects entity sperm Abnormal sperm morphology abnormal gametes abnormal spermatogenesis teratozoospermia presence of structurally anomalous spermatozoa in the semen; malformations include the physical bending of the sperm to produce kinks or bends MPheno.ontology MP:0005578 teratospermia abnormal male germ cell morphology sperm morphology; teratozoospermia sperm morphology variant sperm morphology, abnormal