How do I handle comments about my post baby weight?

Change the topic. May people are curious or trying to be helpful when they comment on your lack of wt loss post pregnancy. Just let them know you appreciate their concern and politely change the topic.
Humor. People should not make judgments about your post baby weight gain/loss. Its your body and its you who makes the decisions about what to eat/exercise. Remember, it took 9 months to put on- the weight is not going to come off overnight. Take compliments by others with a smile and a thanks and let negative remarks slide.