Darwin Core term name: lifeStage. The age class or life stage of the biological individual(s) at the time the Occurrence was recorded. Recommended best practice is to use a controlled vocabulary.

public string LifeStage { get; set; }

Public Property LifeStage As String
	Get
	Set

public:
property String^ LifeStage {
	String^ get ();
	void set (String^ value);
}

member LifeStage : string with get, set