It's not typical for a 7 month old to sleep through the night. Some occasionally do, but they are definitely in the minority. Furthermore, the number of night awakenings change with the babies age. In studies with a large number of infants, it was found that the number of babies waking up at night decreased from birth to 6 months, and then increased from 6 months to a year before starting to decline again.
The kellymom webiste has this to say about infant sleep:
"Probably one of the main reasons that babies who don't sleep through the night are such a big issue is that parents don't have realistic expectations of the sleep patterns of babies. Babies were designed to wake up often at night to feed and cuddle, and keep in mind that many adults wake during the night, too. If our expectations for babies were not so different from our babies' expectations for themselves, much of this "problem" might disappear."
To give you an idea of what's considered typical, here's the results of an infant sleep study: In this study, part of the Avon Longitudinal Study of Pregnancy and Childhood (ALSPAC), researchers surveyed the parents of 640 babies. Some of the results:
Only 16% slept through the night at six months old -- 84% were not sleeping through the night at 6 months, 17% woke more than once per night, ranging from twice to eight times
5% woke once every night
9% woke most nights
50% woke occasionally
16% of six-month-olds had no regular sleeping pattern
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In another study,
"Most infants woke during the night at all ages observed. (3, 6, 9, as 12 months) Younger infants tended to require parental intervention at night to return to sleep, whereas older infants exhibited a greater proportion of self-soothing after nighttime awakenings. However, even in the 12-month-old group, 50% of infants typically required parental intervention to get back to sleep after waking. Results emphasize the individual and contextual factors that effect the development of self-soothing behavior during the first year of life.
Another study found (among other things) that: "It is not until after 24 months that regular night waking (requiring attention) becomes much less common."
http://www.kellymom.com/parenting/sleep/sleepstudies.html
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When my babies woke up in the middle of the night, I would nurse them back to sleep and put them back in the bassinet near my bed. When they were older, I put their crib mattress on the floor near my bed, and them I could lie next to them and nurse them back to sleep. (Or snuggle them to sleep as I do my older one when he wakes up in the middle of the night.) And yeah, whether it was feedings, or illness, or bad dreams, or just restlessness, it was a loooong time, a couple of years, before they consistently slept all night long without a peep.
Now, I'm not saying you're bad or mean - but I believe that "When you KNOW better, you DO better." And if "everyone" has been telling you to let her cry it out, you should know that there's plenty of research on infant sleep that suggests otherwise. "Sleep-training", especially when it involves ignoring the babies cries, is quite controversial, and many studies have shown that the "cry it out" technique is harmful and has long-term effects. (This is not my opinion, this is peer-reviewed research from our top medical schools. Just google for "cry it out harmful" and you'll see what I mean). Again, I don't think you are bad - following advice from other moms, even if it turns out to be awful advice, does not make *you* bad, OK?
The good news is there are lots of gentle, nurturing alternatives, and you won't have that lingering doubt, that conflicted feeling about whether you're doing the best thing for your child. My mother once said that when you're making decisions about your children, you ought to act in a way that will make you feel proud of your decisions 20 years later. She still feels guilty about every little thing she did wrong 40 years ago, (like not nursing us at all) - even if that's what everyone did.
http://www.kellymom.com/parenting/sleep/sleep.html
Sweet dreams!