Week 20 old
What to expect at 20 weeks: your 5-month-old's feeding, sleep, wake windows, and the range of skills many babies are working on now.
In short
At 20 weeks (about 5 months), most babies take 4-5 feedings a day, sleep around 14-15 hours total across 2-3 naps, and stay awake for roughly 2-2.5 hours between sleeps. Many are rolling, grabbing for toys, and babbling, but exact timing varies widely from baby to baby.
🍼 Feeding
Most 20-week-olds take about 24-32 oz of breast milk or formula per day. That's roughly 4-5 nursing sessions, or bottles of about 6-8 oz spaced across the day. Solids are not needed yet for most babies; the AAP suggests waiting until around 6 months and signs of readiness (good head control, sitting with support, interest in food). Talk to your pediatrician before starting solids.
😴 Sleep
Around now many babies sleep about 14-15 hours total per day: roughly 10-11 hours at night (often with one or two feeds) plus 2-3 daytime naps adding up to 3-4 hours. Wake windows typically stretch to about 2-2.5 hours between sleeps. Always place your baby on their back to sleep, on a firm flat surface with no pillows, blankets, bumpers, or soft toys.
What's happening this week
- •Around this age many babies push up on their forearms during tummy time and may be rolling from front to back, with some starting back to front
- •Hand control is growing: many 5-month-olds reach for and grab toys, bring them to the mouth, and pass an object from hand to hand
- •Babbling often expands now, with strings of sounds, squeals, and laughs as your baby experiments with their voice
- •Many babies sit with support and hold their head steady when upright, building toward independent sitting in the months ahead
- •Social connection deepens, and around now many babies smile, coo, and light up at familiar faces
Milestones to keep in mind
- ✓By the 6-month checkup, many babies will roll in at least one direction and reach for nearby objects, though plenty get there a little later
- ✓Around this age, watch for your baby responding to their name or familiar voices and turning toward sounds, a skill many show by the 6-month visit
- ✓Many babies bring hands or toys to the mouth and start showing interest in what others are doing nearby
- ✓By 6 months, look for steady head control and the early signs of sitting with less support, but ranges are normal
Growth
💡 Tip for this week
Now that grabbing is getting stronger, do a quick sweep of the area around your baby before each feeding or play session. Small objects, cords, and hot drinks are suddenly within reach. Keeping a clear, safe zone prevents most close calls at this age.
⚠️ When to call your pediatrician
Call your pediatrician if your baby has fewer than 5-6 wet diapers a day, is refusing feeds or not gaining weight, has a fever of 100.4 F (38 C) or higher, seems unusually floppy or stiff, has lost skills they previously had, or by around the 6-month visit is not making eye contact, not responding to sounds, or not bringing hands to the mouth. Trust your instincts; if something feels off, reach out.
Frequently asked
Can I start solids at 20 weeks?
For most babies, the AAP recommends waiting until around 6 months and looking for readiness signs like steady head control, sitting with support, and interest in food. Some pediatricians okay starting between 4 and 6 months for certain babies. Check with yours before introducing solids.
How much should my 5-month-old be eating?
Most babies this age take about 24-32 oz of breast milk or formula daily, spread over roughly 4-5 feedings. Every baby is a little different, so follow your baby's hunger and fullness cues rather than a fixed number.
My baby isn't rolling yet at 20 weeks. Should I worry?
Not necessarily. Rolling shows up across a wide range, and many babies are not rolling consistently at 20 weeks. By the 6-month checkup, most roll in at least one direction. Mention it to your pediatrician if you have concerns or notice other delays.
Looking for the bigger picture? See the month 5 overview →
General guidance, not medical advice. Every baby develops at their own pace — talk to your pediatrician with any concerns.