At 15 months, DD was saying mama, dada, thank you, hi, that, cat. Now, at 18 months and since I have introduced more and more signs, she only really says, "this," "that" and dada. She babbles, points and grunts for things, as well as signs for many things. But she has a lot less words now and does not "try" to speak like she used to. AS for everything else, She is loving, affectionate, loves to be read to, and she pretends really well with her babies. No other signs of delays but I am really worried about her speech. Am I being paranoid? I will probably bring it up at her 18 month appointment, as well as delay her mmr another 6 months.