#trimester  a period of three months; especially one of the three three-month periods into which human pregnancy is divided
  supertype:  #time_period__period__period_of_time  an amount of time; "a time period of 30 years"; "hastened the period of his recovery"
  subtype:  #first_trimester  #second_trimester  #third_trimester
  part of:  #gestation_period__gestationperiod__gestation  the period during which an embryo develops (about 266 days in humans)

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