R.C.
Parenting is a 24/7 responsibility....and it is HARD sometimes. That means nighttime parenting is just as important as day time parenting. Taking care of kids all day and all night is terribly inconvenient to mom and dad's desire to be comfortable, but so very important. 6 or 7 months is too early for CIO method, the new socially acceptable name for neglect. Good scientific research warns against the danger of it in the following link:http://www.askdrsears.com/topics/fussy-baby/science-says-....
Teething is an issue from 5 or 6 months of age and can cause real alteration in sleep patterns. Sometimes babies are just hungry at night, especially as they become more active and distracted during the day. She needs something and crying is her only way to communicate that. Please just comfort her, attend to her needs, and maybe even hold and rock her(does anyone besides myself do that anymore for their little ones?). She won't need you at night forever, but if you fail to meet her needs now, it may have serious consequences. There's a lot of parenting books out there, but very few of them give good, practical advice. Best advice I ever got with my first child was from my dear sister (Mom to 3), "Please put down the parenting book and start taking care of your child." Just know that there's many, many other parents whose kids need us at night, we are just too tired to talk about it. These days pass all too quickly. Don't rush them.