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.
Current yield, in contrast, is the interest or dividends divided by the current market price. In the case of bonds, the yield on your investment and the interest rate your investment pays are sometimes, but by no means always, the same. If the price you pay for a bond is higher or lower than par, the yield will be different from the interest rate.