id	keyword
ct-9198	sperm
ct-9198	semen
ct-9198	epididymal
ct-9198	extender
ct-9198	egg
ct-9198	membrane
ct-9198	yolk
ct-9198	botubov
ct-9198	optixcell
ct-9198	motility
ct-9198	cryopreservation
ct-9198	bulls
ct-9198	bovine
ct-9198	liposome
ct-9198	plasma