text: Yo, check it out, we tested in the lab,
  Oral RU 486 and anordrin, that's fab.
  Rats, rabbits, and hamsters, we put 'em to the test,
  To see if these compounds could terminate early pregnancy best.
  
  In the rat and rabbit, the combo worked supreme,
  RU 486 and anordrin, a winning team.
  They terminated pregnancy like a champ,
  Stronger than when used alone, no damp.
  
  A low dose of RU 486, combined just right,
  With anordrin, it caused an additive might.
  Embryos resorbed, pregnancy ceased,
  Progesterone and estradiol, levels decreased.
  
  But hold up, in the hamster, things went awry,
  RU 486 couldn't interrupt, no matter how high.
  Even at four times the dose that worked in the rat,
  Progestin receptor, it couldn't bind to that.
  
  Surprisingly, anordrin didn't have an effect,
  Even at high doses, it didn't detect.
  Conclusion is clear, in rat and rabbit, you see,
  RU 486 and anordrin, a dynamic synergy.
  
  Terminating pregnancy, they do it so well,
  Lower doses needed, that's the story we tell.
  So remember this study, it's got the facts,
  RU 486 and anordrin, a powerful pact.