It also changes in size during childbirth. For most people, variations don't affect function but procedures like dilation may be needed in people who have had vaginoplasty surgery to create or repair ...

Function φ = atan2(y,x) calculates the 4-quadrant inverse tangent in the range -Pi to Pi. Functionally equivalent to the atan2 function in 'C' and MATLAB®. Ideal for the measurement of complex phase ...