Quick Answer
Yes, and with remarkable precision from the very first days of life. The olfactory system is one of the earliest sensory systems to develop in the womb, and newborns arrive already capable of recognising and responding to specific familiar smells, particularly their mother's scent, amniotic fluid, and breast milk. This early olfactory recognition is not a minor capacity; it plays a central role in bonding, feeding initiation, and emotional regulation in the newborn period.
When Does the Sense of Smell Develop?
The olfactory system begins developing from around 7 to 8 weeks of gestation, making smell one of the earliest senses to become functional. By the second trimester, the olfactory receptors in the nose are formed, and by the third trimester, the fetus is actively experiencing smells transmitted through the amniotic fluid. The amniotic fluid carries the scent of the mother's diet, body, and environment, giving the developing baby months of olfactory experience before birth.
This prenatal olfactory learning has real consequences at birth. Newborns are not encountering smell for the first time; they arrive with an existing olfactory memory built from their experience in the womb.
What Smells Can Newborns Recognise?
Their Mother's Scent
This is the most consistently documented example of newborn olfactory recognition. Studies have shown that newborns as young as 2 to 3 days old will turn their head preferentially toward a breast pad worn by their mother over one worn by an unfamiliar woman. This preference is specific to the mother's unique scent and is not simply a preference for female body odour in general. It develops rapidly after birth and is one of the earliest and most reliable signs of individual recognition in newborns.
Amniotic Fluid
Newborns recognise the scent of amniotic fluid, which was the olfactory environment of the womb. Research has shown that newborns placed near a cloth scented with amniotic fluid show less distress and more calm than those placed near an unscented cloth. This recognition is thought to underlie one of the most remarkable behaviours observed in the early hours after birth: the breast crawl, in which a newborn placed on the mother's abdomen can locate the nipple unaided, guided partly by the similarity between the scent of the areola and the scent of amniotic fluid.
Breast Milk
Newborns show a strong attraction to the scent of breast milk, even breast milk from mothers other than their own. The scent of breast milk activates rooting and sucking behaviours in newborns and is one of the primary mechanisms by which newborns locate and latch to the breast in the early days. For parents who are bottle feeding, placing a small amount of expressed breast milk on the bottle teat before offering it can help a newborn accept the bottle more readily by providing this familiar scent cue.
Familiar Foods and Flavours From the Womb
Research has shown that newborns and young babies show a preference for the scents and flavours of foods their mother ate regularly during pregnancy and breastfeeding, as these compounds are transmitted through the amniotic fluid and breast milk. Babies whose mothers ate garlic, vanilla, or carrots regularly during pregnancy show measurably greater acceptance of those flavours when they encounter them through breast milk or later through weaning foods. This prenatal flavour learning is one of the earliest examples of nutritional preference formation.
How Olfactory Recognition Shapes Early Behaviour
The practical implications of newborn olfactory recognition are significant:
- Feeding: Scent guides newborns toward the breast or bottle from the earliest feeds. The scent of the breast triggers rooting and sucking behaviours that support feeding initiation before visual or tactile guidance is reliable
- Bonding: Recognising and preferring their caregiver's scent helps newborns orient toward the person most likely to meet their needs. This scent-based recognition supports the formation of attachment from the very first hours
- Emotional regulation: Familiar scents are calming for newborns. A newborn placed near an item of clothing worn by their primary caregiver will typically show less distress and settle more quickly than one without this olfactory comfort. This is one reason why a worn but unwashed garment placed near (but never inside) a baby's sleep space can be an effective settling tool
- Stranger awareness: Unfamiliar scents can trigger alerting and mild distress responses in newborns, even before stranger anxiety develops in its more obvious form at 6 to 8 months. This is one reason why strong perfumes and heavily scented products can be unsettling for young babies
Practical Implications for New Parents
- Skin-to-skin contact: Maximising skin-to-skin time in the early days and weeks gives your baby the most direct access to your natural scent and supports both bonding and breastfeeding establishment
- Avoid strong fragrances: Strong perfumes, heavily scented lotions, and fragranced laundry products can mask your natural scent and may be disorienting or unsettling for a young baby. Unscented or lightly scented products are preferable in the newborn period
- Use scent as a settling tool: A piece of clothing you have worn can provide olfactory comfort during sleep or when your baby is cared for by another person. Always follow safe sleep guidelines and keep any clothing outside the sleep space rather than inside the crib
- Bottle feeding and scent: For breastfed babies transitioning to a bottle, warming the teat with expressed breast milk before offering it brings the familiar scent of breast milk to the first point of contact, which can reduce resistance and support acceptance. The Emulait Glass Classic Bottle features a breast-shaped nipple designed to feel and function like the breast, and pairing it with a familiar scent cue makes the sensory transition from breast to bottle as seamless as possible
Key Takeaway
Newborns can recognise familiar smells from birth, including their mother's scent, amniotic fluid, and breast milk, because the olfactory system develops early in pregnancy and babies arrive with existing olfactory memories built from months in the womb. This recognition shapes feeding, bonding, and emotional regulation from the very first hours. Maximise skin-to-skin contact, avoid strong fragrances, and use familiar scent cues intentionally to support settling and bottle acceptance in the early weeks.
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This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your pediatrician or a qualified healthcare provider with questions about your baby's health.