<prompt> Repair of cleft lip should be undeaken at:4 weeks6 weeks8 weeks10 weeks  <response>: Timing of Lip Repair: The classic rule of tens is still a reasonable guideline for lip repair: 10 weeks of age, a weight of 10 pounds, and hemoglobin of 10 have been considered prerequisites for lip repair. This is paly based on anesthetic safety, which is probably a little better with increased age. The timing of the lip repair must be individualized for the patient. 