Introduction
The paediatric developmental history OSCE requires you to take a structured history from a parent or carer, assess developmental progress across four domains, and identify red flags. Sensitive communication with parents — particularly when concerns exist — is heavily weighted on mark schemes.
💎 Clinical Pearl
Always build rapport with both the parent and child. Direct some questions to the child at an age-appropriate level. Acknowledge parental concerns explicitly: "That sounds really worrying — can you tell me more about what you have noticed?"
Developmental Domains
🧠 Mnemonic
SGSS — Sitting/Standing (Gross Motor), Squeezing (Fine Motor), Speaking (Language), Smiling (Social)
The four domains are: gross motor, fine motor and vision, speech and language, and social and emotional development.
Key Developmental Milestones
| Age | Gross Motor | Fine Motor | Speech and Language | Social |
|---|---|---|---|---|
| 6 weeks | Lifts head briefly prone | Fists loosely open | Coos | Social smile |
| 3 months | Head control when held sitting | Hands to midline | Vocalises to voice | Recognises mother |
| 6 months | Sits with support | Palmar grasp, transfers | Babbles (ma-ma non-specific) | Stranger awareness begins |
| 9 months | Sits unsupported | Pincer grasp emerging | Babbles with intonation | Waves bye-bye, peek-a-boo |
| 12 months | Stands with support, cruises | Neat pincer grasp | 1-3 meaningful words | Points to objects of interest |
| 18 months | Walks independently | Builds 3-block tower | 6-20 words | Symbolic play |
| 2 years | Runs, climbs stairs both feet | Builds 6-block tower | 50+ words, 2-word phrases | Parallel play |
| 3 years | Rides tricycle, jumps | Draws circle, uses scissors | 3-word sentences | Group and imaginative play |
| 5 years | Skips, hops on one foot | Draws person with 6 parts, writes name | Fluent speech, tells stories | Cooperative play, rule-following |
Developmental History Framework
Presenting Concern
- What specific concern does the parent have?
- When was it first noticed? By whom?
- Has there been any regression (loss of previously acquired skills)?
⚠️ Red Flag
Developmental regression is always a red flag. Loss of social skills or language in a toddler should prompt urgent consideration of autism spectrum disorder or a neurodegenerative condition.
Birth and Neonatal History
- Gestation (use corrected age for prematurity until 2 years)
- Mode of delivery and complications
- NICU admission, neonatal jaundice, hypoglycaemia, infection
Past Medical History
- Chronic conditions: cerebral palsy, epilepsy, hearing or vision impairment
- Recurrent ear infections (glue ear causes conductive hearing loss causing speech delay)
Immunisations and Screening
- Up to date with schedule?
- Newborn hearing screen passed?
- Newborn blood spot passed?
- Vision screening?
Family and Social History
- Developmental delay in siblings or parents
- Consanguinity
- Nursery or school attendance
- Safeguarding concerns
Corrected Age for Prematurity
Always correct for prematurity until 2 years of age:
Corrected age = chronological age minus weeks of prematurity
Example: Baby born at 28 weeks (12 weeks premature), now 9 months chronological age.
Corrected age = 9 months minus 3 months = 6 months.
Assess milestones appropriate for 6 months.
Red Flags by Age
| Age | Red Flags |
|---|---|
| 6 weeks | No social smile |
| 6 months | Not reaching for objects, not babbling |
| 12 months | No pointing, no babbling |
| 18 months | No single words, no pointing, not walking |
| 2 years | No 2-word phrases, not understood by parents |
| 3 years | Strangers cannot understand child |
| Any age | Loss of previously acquired milestones |
Closing the Consultation
- Summarise back: "It sounds like you are worried that James is not talking as much as other children his age — is that right?"
- Explore concerns: "What do you think might be causing this?"
- Safety net: "If you notice any loss of skills he already has, please come back sooner"
- Refer appropriately: community paediatrician, speech and language therapy, audiology, ophthalmology
"What are the four developmental domains?"
Gross motor (large muscle movement and balance), fine motor and vision (hand and finger coordination), speech and language (understanding and expression), and social and emotional development (interaction, play, self-care). A developmental history covers all four domains and notes any regression.
"What is a developmental red flag at 18 months?"
At 18 months, red flags include: no single meaningful words beyond mama or dada, no pointing to objects of interest, not following simple one-step instructions, and not walking independently. Loss of any previously acquired skill at any age is always a red flag and should prompt urgent review.
"How do you correct for prematurity when assessing developmental milestones?"
Subtract the number of weeks of prematurity from the chronological age. A baby born at 30 weeks (10 weeks premature) with a chronological age of 8 months has a corrected age of approximately 5.5 months. Use the corrected age for developmental milestone assessment until the child reaches 2 years of age.
"What features in a developmental history would make you suspect autism spectrum disorder?"
Key features suggesting ASD include: regression of social skills or language after the first year, lack of pointing at 12 months, reduced eye contact, limited social smile, absent or abnormal babbling, restricted and repetitive interests, and unusual sensory sensitivities. Refer to a community paediatrician or specialist diagnostic service.
Related guides: [Paediatric History Taking OSCE](/blog/paediatric-history-taking-osce) | [Communication in OSCE](/blog/osce-communication-mistakes) | [Psychiatric History OSCE](/blog/psychiatric-history-osce)