preferred_name: Absent central pair of singlet microtubules seen on scanning electron microscopy (SEM) of sperm
preferred_name_lc: absent central pair of singlet microtubules seen on scanning electron microscopy (sem) of sperm
label: Absent central pair of singlet microtubules seen on scanning electron microscopy (SEM) of sperm
label_lc: absent central pair of singlet microtubules seen on scanning electron microscopy (sem) of sperm