DrParenting
Baby Development, Birth to 12 Months: Sleep, Play, Feeding and Milestones
DrParenting’s guides to a baby’s first year in one place: what most babies do and when, safe sleep and sleep schedules, tummy time and play, feeding from breast and bottle to first foods, and the signs that call for a doctor.
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- Patient Focused
By their first birthday, most babies pull up to stand, walk holding on to furniture, wave “bye-bye” and pick up small bits of food between thumb and pointer finger.1 This page gathers DrParenting’s guides to sleep, play, feeding and health in the first year, with DrSensory’s month-by-month milestone guide.
Key takeaways: a baby’s first year
- Milestones are what most babies do, not all. The CDC describes developmental milestones as things most children, 75% or more, can do by a certain age.1 Its checklists start at 2 months and run to 5 years.2
- Back to sleep, every sleep. The American Academy of Pediatrics says to place a baby on their back for all naps and at night, on a firm, flat surface, and to share a room, but never a bed, for at least the first 6 months.3
- Tummy time starts early. The AAP says tummy time can start the day a baby comes home from the hospital, while the baby is awake and closely supervised, working up to 15 to 30 minutes a day by 7 weeks.4
- First foods come at about 6 months. The AAP recommends only breast milk for about the first 6 months, then continued breastfeeding alongside first foods.5
- A fever under 3 months means a call. If a baby 3 months or younger has a rectal temperature of 100.4°F (38°C) or higher, the AAP says to call the pediatrician immediately, even with no other signs of illness.6
- You can ask for an evaluation yourself. If your baby’s development worries you, call your state’s early intervention program; a doctor’s referral is not necessary.7
What does DrParenting’s baby development page cover?
The first twelve months, from the newborn weeks to a first birthday. The guides below come from across DrParenting: play and the toys that suit each stage, sleep schedules and safe sleep gear, feeding from breast and bottle to first foods, a baby’s health at home, and how to tell when a baby has had too much and needs a quieter moment. Strollers, car seats, carriers and the baby registry are on the DrParenting home.
For the years from 1 to 3, see DrParenting’s toddler guides; for a parent’s own health after birth, see DrParenting Health.
Which DrParenting baby guide answers my question?
Start with the question you have. Each one below leads to the guide that answers it.
- “Is my baby on track for their age?” Baby Development Month by Month: The First Year
- “How much should my baby sleep, and when?” Baby Sleep Schedules: What Actually Works
- “Which bassinet or crib is safe for a newborn?” Best Bassinets and Cribs 2026: A Safe-Sleep Guide
- “My baby fusses through tummy time.” Tummy Time Toys That Make It Fun
- “How do I know if my baby is overstimulated?” What Overstimulation Really Looks Like
- “Should my baby use a pacifier?” Pacifiers: What the Evidence Actually Says
- “Which thermometer should I use for a newborn?” Best Baby Thermometers 2026: Fast, Accurate, and Fuss-Free
How does play help a baby’s development in the first year?
Floor time builds the strength a baby needs for each new skill: the AAP says supervised tummy time helps babies build strong muscles and the skills they need to reach important developmental milestones.4 The guides below cover toys matched to each age, tummy time, play mats and activity gyms, first board books, and the signs that a baby has had more than they can take in.
The Best Developmental Toys for Your Baby's First Year
Tummy Time Toys That Make It Fun
Play Mats and Activity Gyms: A Buying Guide
Building a Library: The Best Board Books for Babies and Toddlers
What Overstimulation Really Looks Like
How can parents help a baby sleep safely?
Start with the AAP’s basics: a baby sleeps on their back for every nap and at night, on a firm, flat surface, in a sleep space in the parents’ room but not in the parents’ bed for at least the first 6 months, with no blankets, pillows, stuffed toys or bumper pads in the bed. The AAP also says not to use weighted blankets, sleepers, swaddles or other weighted objects on or near a baby.3 The guides below cover schedules and wake windows, bassinets and cribs, swaddles and sleep sacks, white noise, baby monitors, and two parents’ accounts of the sleep products they tried.
Baby Sleep Schedules: What Actually Works
Buying guide · SleepBest Bassinets and Cribs 2026: A Safe-Sleep Guide
Buying guide · SleepBest Swaddles and Sleep Sacks 2026: Expert Reviews
Product review · SleepSwaddelini Review: A Swaddle for Babies Who Break Out
Are Weighted Blankets Safe for Infants? What Every Parent Needs to Know
Parenting guide · SleepNoise Machines for Babies: The Ultimate Sleep Solution or Just White Noise?
Best Baby Monitors 2026: Reviews and a Buying Guide
The Automated Crib: A Great Idea—But Not the Solution for Our Family
What should parents know about feeding a baby in the first year?
That milk comes first and solid food follows at about 6 months. The AAP recommends only breast milk for about the first 6 months, then first foods alongside continued breastfeeding for as long as parent and child wish.5 The guides below cover bottles and nipple flow, breast pumps for home and work, one family’s breastfeeding bottle, pacifiers, baby food makers, and high chairs for the first meals at the table.
Buying guide · FeedingBest Baby Bottles 2026: A Parent's Buying Guide
Breast Pumps and Breastfeeding Supplies: A Buying Guide
Discover the Medela Handheld Pump: A Quiet Manual Pump for Working Moms
How the Mum Bottle Saved My Breastfeeding Journey (And My Sanity)
Parenting guide · FeedingPacifiers: What the Evidence Actually Says
Buying guide · FeedingBest Baby Food Makers 2026: The Tools That Make Solids Simple
Buying guide · FeedingBest High Chairs 2026: Reviews and a Buying Guide
How do parents keep a baby healthy and safe at home?
Know the fever rule that does not wait. If a baby 3 months or younger has a rectal temperature of 100.4°F (38°C) or higher, the AAP says to call the pediatrician immediately, even if the baby shows no other signs of illness, and a rectal reading is the most reliable for infants.6 The guides below cover thermometers by age, when to start baby-proofing and what to secure in each room, and humidifiers and air purifiers for the nursery.
Buying guide · HealthBest Baby Thermometers 2026: Fast, Accurate, and Fuss-Free
The Baby-Proofing Mindset: When and How to Start
Best Nursery Humidifiers and Air Purifiers 2026: A Healthy-Nursery Guide
Where can parents track baby milestones month by month?
On DrSensory, the clinical side of the site. Its baby guide sets out milestones month by month with the red flags worth a call, its free checklist follows the CDC’s lists from 2 months to 3 years, and its sleep regression guide covers regressions from 4 months to 3 years. The CDC’s own checklists cover 2, 4, 6 and 9 months and 1 year, then continue to age 5.2
DrSensory guide · DevelopmentBaby Development Month by Month: The First Year
DrSensory guide · DevelopmentDevelopmental Milestone Checklist: Birth to Three
DrSensory guide · SleepSleep Regressions in Babies and Toddlers: Ages, Signs, How Long They Last, and How to Help
When should parents ask a doctor about a baby’s development?
Whenever something worries you, without waiting. The CDC’s advice is to act early if a child is not meeting one or more milestones, has lost skills they once had, or you have other concerns: talk with your child’s doctor, share your concerns and ask about developmental screening.2 The American Academy of Pediatrics recommends developmental screening for every child at the 9-, 18- and 30-month well-child visits.8
You can also ask for an evaluation yourself. For a baby or toddler under 3, call your state or territory’s early intervention program and say you would like your child evaluated; a doctor’s referral is not necessary.7 Our guides explain how to get a free evaluation for your child and how early intervention compares with private therapy, and the DrSensory directory lists occupational, physical and speech therapists near you.
Where can parents read more about baby development and therapy?
DrSensory’s clinical guides for the first year:
- Developmental Milestones and Red Flags by Age: Birth to Five: milestones from 2 months to 5 years in the CDC’s own words, and the red flags to raise.
- Flat Head Syndrome (Plagiocephaly) in Babies and Torticollis in Babies: a flat spot or a head tilt, what helps, and when to see a doctor.
- Bottle Use and Oral Development: why the bedtime bottle matters, and when and how to switch to an open cup.
- How to Create a Sensory Room for Your Baby: a calm, safe space for awake, supervised play.
- Physical Therapy for Babies and Toddlers, Occupational Therapy for Babies and Toddlers and Speech Therapy for Babies and Toddlers: what each therapy does for a child under 3, and how to get an evaluation.
Who writes DrParenting’s baby guides?
The DrParenting team publishes them, and a piece from a parent or an outside contributor carries that person’s own byline. Buying guides and product reviews can contain affiliate links, and the cards above mark the ones that do; How DrParenting works explains how products are chosen and how the section is paid for.
None of these guides replaces advice about your own child from your child’s doctor or therapist.
Frequently asked questions
What should a baby be doing by 12 months?
Most babies pull up to stand, walk holding on to furniture, wave “bye-bye”, call a parent “mama”, “dada” or another special name, and pick up small bits of food between thumb and pointer finger by their first birthday.1 If your baby is not doing one of these, has lost a skill, or something else worries you, talk to your pediatrician and ask about developmental screening.2
How should a baby sleep safely?
On their back for all naps and at night, on a firm, flat sleep surface, with no blankets, pillows, stuffed toys or bumper pads in the bed. The AAP recommends sharing a room with your baby, but not a bed, for at least the first 6 months, and says not to use weighted blankets, sleepers or swaddles.3
When should tummy time start?
The day your baby comes home from the hospital, while your baby is awake and someone is watching. Build up gradually as your baby enjoys it, working up to 15 to 30 minutes a day by 7 weeks.4
When can a baby start solid food?
At about 6 months. The AAP recommends only breast milk for about the first 6 months, then first foods alongside continued breastfeeding. Ask your pediatrician what fits your baby.5
When is a fever in a baby an emergency?
If your baby is 3 months or younger and has a rectal temperature of 100.4°F (38°C) or higher, call your pediatrician immediately, even if your baby shows no other signs of being ill.6
Do I need a doctor’s referral for an early intervention evaluation?
No. For a baby or toddler under 3, call your state or territory’s early intervention program and ask for an evaluation; a doctor’s referral is not necessary.7
Are DrParenting’s baby guides medical advice?
No. They are general information for parents, and none replaces advice about your own baby from your pediatrician.
Sources
- Centers for Disease Control and Prevention. Milestones by 1 Year (Learn the Signs. Act Early.). cdc.gov. Checked October 31, 2026.
- Centers for Disease Control and Prevention. CDC’s Developmental Milestones (Learn the Signs. Act Early.). cdc.gov. Checked October 31, 2026.
- American Academy of Pediatrics. A Parent’s Guide to Safe Sleep. HealthyChildren.org. healthychildren.org. Checked October 31, 2026.
- American Academy of Pediatrics. Back to Sleep, Tummy to Play. HealthyChildren.org. healthychildren.org. Checked October 31, 2026.
- American Academy of Pediatrics. Starting Solid Foods. HealthyChildren.org. healthychildren.org. Checked October 31, 2026.
- American Academy of Pediatrics. Fever and Your Baby. HealthyChildren.org. healthychildren.org. Checked October 31, 2026.
- Centers for Disease Control and Prevention. Early Intervention (Learn the Signs. Act Early.). cdc.gov. Checked October 31, 2026.
- Centers for Disease Control and Prevention. Clinical Screening for Autism Spectrum Disorder. cdc.gov. Checked October 31, 2026.
Medical disclaimer. This page is for general educational purposes and does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your baby.