9 Week Old Baby Development. Kidshealth from nemours, week 9, 2021. Bedtime might be shifting earlier (around 9pm), and while they still may need to wake to.
That said, every baby grows at their own pace, so no need to stress if your baby is gaining weight and growing faster or slower than that other newborn down the block. Kidshealth from nemours, week 9, 2021. Merck manual, stages of development of the fetus, may 2021.