Parenting often comes with endless questions, especially for new parents trying to make the best decisions for their baby’s health and safety. Pediatrician Dr. David Hill, a father of five with more than 25 years of experience, says one of the most common questions he hears is, “Is this normal?”
Hill, who has served as associate medical editor of the American Academy of Pediatrics’ (AAP) Caring for Your Baby and Young Child and will be editor-in-chief of its next edition, emphasizes that “normal” can vary widely. What matters, he says, is relying on trustworthy, science-based advice and building a strong relationship with a pediatrician.
“Parents come to me with all kinds of information they’ve found online,” Hill said. “That trust between families and their pediatrician is what steers us through the swamp of misinformation and disinformation out there.”
Over his career, Hill has seen baby care recommendations change significantly as new research reshaped best practices. Here are five of the most important updates:
1. Safe Sleep Practices
Sleep guidance underwent a major shift in 1994 with the launch of the “Back to Sleep” campaign, which advised parents to place babies on their backs, rather than their stomachs. Since then, additional measures have banned drop-side cribs and unsafe sleep products. While sudden infant death rates have dropped by nearly half since 1990, Hill stresses that many tragedies can still be prevented by following current guidelines: place babies on their backs, use firm, flat mattresses, and avoid co-sleeping or soft bedding.
2. Food Allergy Prevention
Once, parents were told to delay giving infants peanuts, eggs, and other allergens until age 2 or 3. But the 2015 LEAP trial overturned that advice, showing that early exposure — starting around six months when solids are introduced — actually reduces allergy risks. Today, experts recommend introducing potential allergens during infancy rather than avoiding them.
3. Umbilical Cord Care
Decades ago, antiseptic dyes or alcohol were used on umbilical cords to prevent infection. Current guidance is simpler: let the cord dry naturally, avoid prolonged moisture, and monitor for redness or discharge. Immediate medical care is needed if signs of infection appear.
4. Vaccines and Protection from Illness
Vaccination schedules have steadily expanded, providing stronger defense against childhood illnesses once feared by pediatricians. Vaccines against Hib (Haemophilus influenzae type b) in the 1980s, pneumococcal disease in 2000, and most recently RSV, have dramatically reduced hospitalizations and severe infections in infants.
5. Addressing Childhood Stress and Trauma
Pediatrics has also embraced a broader understanding of how early-life experiences affect health. Since the landmark Adverse Childhood Experiences (ACEs) study in 1998, physicians now recognize how trauma, abuse, or instability can alter brain development and long-term health. This knowledge has fueled trauma-informed care, which focuses on supporting families, reducing stress, and building nurturing relationships that protect children.
Hill says this willingness to revise advice in light of new science is central to good medicine: “Anybody who’s never wrong, I don’t trust, because none of us is perfect.”
For parents, that means today’s guidance may look very different from what was once recommended — but it reflects decades of evolving research aimed at keeping babies safe and healthy.
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