id	keyword
ct-9448	sperm
ct-9448	semen
ct-9448	midpieces
ct-9448	stallion
ct-9448	extender
ct-9448	milk
ct-9448	fixation
ct-9448	diluents
ct-9448	raw
ct-9448	incidence
ct-9448	microscopy
ct-9448	yolk