id	keyword
ct-10137	bulls
ct-10137	age
ct-10137	testicular
ct-10137	puberty
ct-10137	anim
ct-10137	reproductive
ct-10137	theriogenology
ct-10137	sperm
ct-10137	circumference
ct-10137	breeding
ct-10137	beef
ct-10137	sci
ct-10137	testes
ct-10137	semen
ct-10137	development
ct-10137	traits
ct-10137	fertility
ct-10137	soundness