Did/Does Your Baby Do This?--Sleeping Habits.

7 weeks? I think at this age he is still getting used to being outisde the womb. This is way too early for established sleeping habits. Your daughter was an unusual baby and you are assuming he should be like she was. I know of only one baby who was sleeping 9 hours at a time at 7 weeks! My kids sure weren't. One of my kids didn't sleep like that until she was nearly 4 or 5!
Take it slow and expect that this child will be different than his sister - they all are. Wait until school starts for him and you'll really being to see the didfferences. Kids come from the same gene pool and they are so very very different from each other. That's a blessing.

He's still awfully young so I'd say you will be dealing with his unpredictable sleep pattern for quite awhile yet. Consider yourself lucky that your first born was so simple, most are not and it looks like you are having that experience right now. Now you will understand why so many new parents are TIRED ;)

Yes, it's normal! Personally, I think you got lucky with your daughter. Many babies still wake up throughout their first YEAR and sometimes longer. If you are getting 5 or more hours stretches of sleep at 7 weeks old, your baby is already sleeping better than many infants do. I would still expect some erratic sleeping habits even though you "know he CAN sleep through the night." I know it's hard not to compare your kids (and boy do I fall into this trap sometimes!), but you're going to notice not all kids, even those with the same parents, do things at the same age.

Absolutely lucky with your first child. Mine took 4-5 months before she was on a regular schedule and that was still with waking through the night to eat. She didn't sleep 8-10 hours on a regular basis until she was 10 months. Your baby is very young and right now sleeping 4-5 hours at a time is sleeping through the night for them. He is very, very normal.

sadly yes, this is normal. it really depends on the baby whether they're a great sleeper or not. and you ca'nt sleep train until they're 6 months old so you have at least that long to wait before you can sleep through the night. sorry to be the bearer of bad news! just mark the 6 month marker on your calendar ;)

My son never slept consistently through the night till he was 2. He is 6 now and sleeps great. We read everything we could and tried many different methods. I think it's just a personality thing. My daughter who is now 1 also consistently wakes up most nights. She occasionally sleeps through the night. Again, I think some kids just don't do it and others do. I'm so sorry you are having rough nights!