You'll likely see this change around 4 to 6 months, when your baby starts eating solid food. That being said, if you still notice your baby is gassy, continue with burping and other gas-relief techniques until you feel they are not needed.
If the bond is trading at par current yield equals coupon rate which in turn equals yield to maturity. If the bond is trading below par (trading at discount) yield to maturity is higher than current yield which is in turn higher than the coupon rate.
In reference to bonds, running yield is one of the many ways to calculate the yield of a bond. While the coupon rate of a bond represents the nominal yield which is calculated by dividing the annual coupon payments by the face value of the debt instrument, the running yield uses the current market price of the bond instead of the face value as its denominator.