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.
The term flat yield or current yield is sometimes used to describe a yield calculation which does not take account of the redemption value of a bond. Yields which take into account not only the annual interest receivable but also any capital profit/loss on redemption of the bond are termed redemption yields.