Quick answer: Clinginess peaks at 6–8 months (separation anxiety onset), 12–15 months, and 18 months. It reflects healthy secure attachment. Responding warmly — not trying to engineer independence through ignoring — produces greater independence over time, not less.
Why clinginess peaks when it does
Clinginess and separation anxiety are neurologically linked to a specific developmental milestone: object permanence — the understanding that people continue to exist when not visible — emerges at around 7–8 months. Before this, out of sight was genuinely out of mind and separation caused no distress. Once a baby can hold a mental representation of the absent caregiver, they can feel the loss of that person. But they can’t yet understand time (‘Mummy will be back in 20 minutes’) — so every separation feels permanent. This is not insecurity; it is cognitive advancement. The baby has learned something important and is experiencing the emotional consequence of that learning.
Clinginess and attachment security
Clingy babies are typically securely attached. A secure attachment — characterised by confidence that the caregiver will be available and responsive — allows the baby to show their needs clearly and to protest separation effectively. Insecure attachment may produce less overt distress at separation not because the baby is more independent but because they’ve learned that protesting doesn’t produce a response. Research consistently shows that securely attached children become more independent as they develop — the foundation of trust enables exploration. The child who clings securely at 12 months is typically the more confident, independent explorer at 3 years.
What actually helps
Predictability: consistent routines and consistent responses to the baby’s needs build the internal working model that the caregiver is reliable. Narrating departures: tell the baby where you’re going before you leave the room, even from very early on — the consistent pattern builds trust over time even before the words are understood. Progressive separation practice: put baby down for supervised floor play while staying in the room, then stepping out briefly and returning. Babywearing during peak clingy phases allows the parent to remain functional while meeting the contact need. At nursery drop-off: a warm, confident, brief goodbye is more effective than prolonged farewells — drawn-out departures maintain distress rather than reducing it.
When it starts to resolve
Most babies show significant improvement in separation anxiety between 14–18 months as language and comprehension develop and as repeated experience of the caregiver returning builds a reliable internal model. ‘You’ll be back’ becomes a known fact rather than an unknown fear. The 18-month peak (a second separation anxiety wave) typically resolves by 2–2.5 years.
Frequently Asked Questions
My 9-month-old screams if I leave the room — is that normal?
Completely normal at 9 months. This is peak separation anxiety territory. Most babies show significant improvement between 12–15 months. In the meantime: narrate your movements before leaving the room, return quickly and consistently, and give brief reassuring reappearances without long re-engagement.
Will responding to clinginess make it worse?
No — the opposite is true. Consistent, warm responsiveness to clinginess produces secure attachment, and securely attached children show less anxious, clingy behaviour over time. The concern that responding creates dependence is not supported by attachment research.
My baby only wants me, not my partner — how do we handle this?
A preference for the primary caregiver at 6–12 months is normal. The non-preferred parent should build connection through regular, positive, play-based interaction — not through need-based caregiving initially. Over weeks, as the baby builds trust through enjoyable interaction, the preference broadens. Don’t force the baby into the arms of the non-preferred parent; allow them to approach at their own pace.
Related Reading
- 1 month old baby: milestones, sleep & feeding guide
- Separation anxiety in babies vs toddlers: what’s different
Found this helpful? Sign up to the LylyMama newsletter — evidence-based answers to the questions every new parent actually has.
