The role of relaxin in anterior cruciate ligament injuries: a systematic review.

Objective: Anterior cruciate ligament (ACL) tears are exceedingly common among the athletic population and are seen with higher incidence in females. Observational studies have noted peak ACL tear rates in the luteal phase of the menstrual cycle, a time in which the hormone relaxin peaks in serum concentration.

Methods: A systematic review of the literature was performed.

The effects of timing of pediatric knee ligament surgery on short-term academic performance in school-aged athletes.

Background: Orthopaedic injuries negatively affect the academic lives of children.

Hypothesis: The timing of anterior cruciate ligament (ACL) and medial patellofemoral ligament (MPFL) reconstructions affects academic performance in school-aged athletes.

Study Design: Cohort study; Level of evidence, 2.