['HAZLETON', 'LABORATORIES', 'Mating', '.', 'Two', 'females', 'were', 'placed', 'with', 'one', 'malle', '(within', 'each', 'group)', '~in', 'breeding', 'cages,', 'and', 'the', 'malles', 'were', 'rotated', 'weekly...', 'Using', 'the', 'vaginal', 'douche', 'method!,', 'each', 'fenale', 'ae', 'exeminedl', 'defly', 'for', 'a', 'maximum.', 'of,', '21', 'consecutive', 'days', 'for', 'the', 'presence', 'of', 'spermatozoa.', 'The', 'day', 'on', 'which', 'sperm', 'were', 'first', 'observed', 'was', 'designated', 'as', 'Day', '0', 'of', 'gestation..', 'Upon', 'observation', 'of', 'sperm', 'or', 'following:', 'the', '21-day', 'period', 'of', 'mating,,', 'the', 'females', 'were', 'individually', 'housed.', 'Following', 'mating,', 'the', 'males', 'were', 'returned', 'to', 'their', 'individual', 'cages:', 'untill', 'the', 'completion', 'of', 'the', 'study.', 'Observations', 'and', 'Records', 'Mortality,', 'appearance,', 'and', 'behavior', 'of', 'the', 'males', 'and', 'females', 'were', 'observed', 'daily.', 'Food', 'consumption', 'was', 'recorded', 'weekly', 'during', 'the', 'premating', 'period', 'only.', 'Body', 'weights', 'were', 'recorded', 'weekly', 'throughout', 'the', 'study.', 'Interval', 'Sacrifice', 'for', 'Caesarean', 'Delive', ' ', ' ', 'Approximately', 'one-half', 'of', 'the', 'females.', 'in', 'which', 'sperm', 'were', 'observed', 'were', 'sacrificed', 'on.', 'Day', '14', 'of', 'gestation.', 'Caesarean', 'sections', 'were', 'performed,', 'and', 'the', 'following', 'observations', 'were', 'recorded:', 'number', 'sail', 'piseenens', 'of', 'uterine', 'implantation', 'and.', 'resorption', 'sites,', 'number', 'and', 'placement', 'of', 'live', 'and.', 'dead', 'fetuses,', 'fetal', 'weight', 'and', 'length', '(crown', '-', 'rump),', 'and', 'fetal', 'anatomical', 'structure.', 'Gross', 'necropsies:', 'with', 'examination', 'of', 'uterine', 'and)', 'visceral', 'structures', 'were', 'performed', 'on', 'each.', 'of', 'the', 'females', 'sacrificed', 'for', 'Caesarean', 'delivery.', '80320008']