U-Untersuchungen: preventive health checks for babies in the first year
Few parents forget the first paediatrician appointment: the slightly cold examination table, the careful hands working over a tiny body, the reassuring look from the doctor that says everything is fine. In Germany, those appointments are not left to chance or to individual initiative. They follow a nationally standardised programme of preventive checks called the U-Untersuchungen, a sequence of consultations scheduled at precise windows in a child's early life to catch any developmental or health concerns as early as possible. The system is one of the most thorough in the world, jointly designed and regulated by the Gemeinsamer Bundesausschuss (G-BA), the body that governs German healthcare standards, and fully covered by statutory health insurance.
Understanding what each check involves, when it takes place, and what happens if something needs follow-up takes away much of the mystery and helps parents arrive at each appointment prepared and calm. This guide covers the full U2 to U7a schedule, explains the Gelbes Heft (yellow booklet) that records every result, and gives practical advice on getting the most from each visit.
What are U-Untersuchungen?
The term U-Untersuchung simply means "U-examination" or "U-check". The "U" stands for Untersuchung, the German word for examination. Each check is numbered: U1 takes place immediately after birth in the delivery room, and the sequence continues through U9 at around the age of five years. For the first year of a baby's life the relevant checks are U2 through U6, with U7 taking place in the second year and U7a during the third year serving as a kindergarten readiness assessment.
The checks are not simply a weigh-in. Each one involves a structured physical examination, an assessment of motor and sensory development appropriate to the baby's age, screening questions about feeding, sleep, and family wellbeing, and a review of any concerns the parents have raised. The paediatrician records every finding in the Gelbes Heft, the yellow booklet that accompanies the child from birth through to school entry.
The G-BA sets the content, timing, and requirements for each check in its Kinder-Richtlinie (children's directive). The Robert Koch Institut (RKI) provides epidemiological support and tracks national data on child health through these checks. Together, the two bodies ensure the programme remains grounded in current evidence.
The schedule: U2 to U7a
Each check has a defined time window. Appointments must take place within that window for the check to count as completed. Your paediatrician's receptionist will usually help you book within the right period, but knowing the windows yourself means you can prompt the booking if needed.
U2: the early newborn check (days 3 to 10)
U2 is the first check carried out outside the maternity ward, typically at the paediatrician's practice between day three and day ten of life. It is the most intensive of all the checks in terms of the range of screening tests involved. The paediatrician performs a thorough head-to-toe physical examination: heart sounds, lung function, abdominal palpation for organ size, examination of the genitals, skin condition, muscle tone, and primitive reflexes including the Moro and grasp reflexes.
At U2, a small heel-prick blood sample is taken for the extended metabolic newborn screening (Neugeborenenscreening). This tests for more than a dozen rare but treatable metabolic, endocrine, and haematological conditions including congenital hypothyroidism, phenylketonuria (PKU), cystic fibrosis, and various organic acid disorders. Early detection of these conditions allows treatment to begin before symptoms cause irreversible harm.
U2 also includes an ultrasound examination of both hips (Hüftsonographie) to screen for developmental dysplasia of the hip (DDH), a condition where the hip socket does not fully cover the ball of the upper thigh bone. DDH is completely treatable when detected early, usually with a harness worn for a few weeks. Left undetected it can lead to problems with walking and joint pain later in life. The newborn hearing screen (Neugeborenen-Hörscreening), if not already completed in hospital, is also arranged at or around U2.
U3: four to six weeks
U3 falls between the fourth and sixth weeks of life, roughly corresponding to the standard six-week postnatal check familiar to parents in other countries. The paediatrician assesses growth by measuring weight, length, and head circumference and plotting them on growth charts in the Gelbes Heft. Physical tone and reflexes are reviewed again, and the hip ultrasound result from U2 is followed up: if any concern was flagged, a repeat scan may be arranged at this point.
Feeding is a central topic at U3. The paediatrician asks about breastfeeding or formula feeding, how often the baby feeds, whether feeding feels comfortable for the mother, and whether the baby is gaining weight appropriately. This is an important moment to raise any concerns about latch, nipple pain, or suspected tongue tie, because a referral can be made while there is still time to protect the breastfeeding relationship. The paediatrician also asks about the family's overall wellbeing and screens for signs of postnatal depression in the mother.
U4: three to four months
By three months, a baby's development is moving quickly and U4 reflects that. The paediatrician examines motor development, looking at how the baby holds their head when placed on the tummy (tummy time), whether muscle tone is symmetrical on both sides, and how the baby responds to being held upright. Primitive reflexes, such as the Moro reflex, should be fading by now and their persistence can be a useful clinical signal.
Vision and visual tracking are assessed: the paediatrician checks whether the baby follows a moving object with their eyes and whether both eyes move symmetrically. Social responses are also evaluated, including whether the baby is smiling responsively and engaging with faces. Weight, length, and head circumference are measured again. The first immunisations are typically due around this time, and the paediatrician reviews the vaccination status recorded in the Gelbes Heft.
U5: six to seven months
U5 takes place between six and seven months, a period of rapid motor development. The paediatrician looks at whether the baby is beginning to sit with support, whether they are reaching for and grasping objects, and how they transfer toys from one hand to the other. Rolling is usually established by now and the paediatrician checks for symmetrical movement.
Language development begins its formal assessment at U5. The paediatrician asks whether the baby is babbling and making a variety of consonant sounds, whether they turn to look towards a voice or a sound, and whether they respond to their own name. Hearing is assessed informally during the consultation, and any concern about hearing at this stage usually leads to a formal audiology referral. Solid food introduction may be discussed, depending on whether the family has begun weaning.
U6: ten to twelve months
U6 marks the end of the first-year check sequence and covers a child who is approaching or has just reached their first birthday. Motor milestones at this age typically include pulling to stand, cruising along furniture, and taking first steps or preparing to do so. The paediatrician observes the quality of movement and checks whether the baby bears weight evenly on both legs.
Fine motor development is assessed through the pincer grasp: the ability to pick up a small object between thumb and index finger. This skill, which usually emerges between eight and ten months, is an important marker of neurological maturation. Language assessment becomes more detailed at U6: the paediatrician asks about babbling variety, whether the child uses any consistent word-like sounds or approximations for familiar objects or people, and whether they are communicating intentionally through pointing, waving, or showing objects to a caregiver. Separation anxiety and social referencing (looking at a caregiver's face before approaching something unfamiliar) are also briefly discussed.
U7: twenty-one to twenty-four months
U7 falls in the second year and covers language development in detail: how many words the child uses, whether they are beginning to combine words into short phrases, and how much of what they say can be understood by unfamiliar adults. Behaviour, sleep patterns, and eating habits are discussed. A brief dental check is introduced at U7, and the paediatrician asks about fluoride supplementation and tooth brushing habits. Motor skills such as running, climbing stairs, and using a spoon are assessed.
U7a: thirty-four to thirty-six months
U7a is sometimes called the Kita-Vorsorge or Kindergarten readiness check. It assesses whether a child approaching nursery age is ready for the social, communicative, and self-care demands of group settings. Language assessment at U7a is detailed: the paediatrician listens for sentence length, grammatical complexity appropriate to age, and clarity of articulation. Social skills, concentration, and the ability to play alongside other children are discussed with the parents. Any concerns about the child's readiness for Kita or about a potential developmental delay can be addressed with an early referral to speech therapy, physiotherapy, or occupational therapy before the child starts nursery.
The Gelbes Heft: your baby's health passport
The Gelbes Heft is a small yellow booklet issued to every child born in Germany. Its official name is the Kinder-Untersuchungsheft, or children's examination booklet. Every paediatrician who conducts a U-check fills in the relevant pages: measurements are plotted on built-in growth charts, vaccination dates and batch numbers are recorded, developmental findings are noted, and any referrals or follow-up actions are documented. The booklet also has a section for recording allergies and significant illnesses.
The Gelbes Heft is irreplaceable as a longitudinal record. Because it travels with the child rather than staying in a practice computer, it is available at every appointment regardless of whether the child is seeing their regular paediatrician, an emergency department, a specialist, or a locum. For families who move within Germany or from another country, it provides immediate clinical context without the delays involved in requesting records from a previous practice.
Treat the Gelbes Heft as you would a passport. Keep it in the same place at home, bring it to every medical appointment, and photograph each completed page so you have a digital backup. If it is lost, a replacement can be issued, but the historical data recorded in it cannot be reconstructed in full.
What to bring and how to prepare
The practical side of U-checks is straightforward once you have done the first one. Bring the Gelbes Heft to every appointment. For the very early checks (U2 and U3) also bring the maternity notes (Mutterpass) because the paediatrician will want information about the pregnancy, birth, and any neonatal observations made in hospital.
Dress your baby in clothing that is easy to remove: the physical examination requires fully undressing the baby, and wrestling with a newborn's poppered vest while they are cold and unhappy is best avoided when possible. Feed your baby shortly before the appointment if you can, because a well-fed baby is generally calmer during examination. If your baby is in the middle of an illness with fever, contact the practice before attending, as some checks may be better rescheduled to a point when the baby is well.
Write down any questions or concerns before the appointment rather than trying to remember them in the consultation room. Topics that come up commonly include: concerns about feeding quantity or technique, questions about introducing solids, worries about a rash or a soft spot on the skull, sleep questions, developmental comparisons with siblings or other babies, and vaccination questions. Your paediatrician is there to discuss all of these; the U-check consultation is genuinely a dialogue, not only a one-way examination.
What happens if a concern is flagged
Most U-checks conclude with reassurance and a booking for the next appointment. Occasionally, however, the paediatrician notices something that needs further attention. This might be a hip measurement at the borderline of normal, a heart murmur heard through the stethoscope, asymmetric reflexes, slower-than-expected weight gain, or a language milestone not yet reached at the expected age. A flagged concern at a U-check does not mean your child has a serious problem. It means the system is working as intended: identifying things that need closer attention before they become harder to address.
When a concern is noted, the paediatrician documents it in the Gelbes Heft and explains the next steps clearly. This usually involves one of three paths: a repeat measurement or observation at the next U-check, an in-practice reassessment in a few weeks, or a referral to a specialist. Referrals from U-checks are treated as medically indicated and covered by statutory insurance. Common referral destinations include paediatric orthopaedics for hip or bone concerns, paediatric cardiology for heart murmurs, audiology for hearing concerns, and early intervention services (Frühforderung) for developmental delay.
If a referral is made, ask the paediatrician to explain what the specialist will be looking for and what the range of possible outcomes is. Ask also whether you should bring the Gelbes Heft to the specialist appointment (the answer is almost always yes). Following up on referrals promptly is important: early intervention for most conditions detected at U-checks produces significantly better outcomes than intervention after a delay.
Frequently asked questions
Are U-Untersuchungen mandatory?
The checks are not mandatory under federal law, but they are fully covered by statutory insurance and strongly recommended by the G-BA. Several German states send reminder letters and some require proof of attendance at certain checks before Kita enrolment. Missing a check is never punished, but attending them is the standard of care that virtually all paediatricians recommend.
What is the Gelbes Heft and why is it important?
The Gelbes Heft is the official yellow child health booklet issued at birth. It records every U-check result, all vaccinations, growth measurements, and any referrals. Because it stays with the family rather than with a single practice, it serves as a portable health record that any doctor can read immediately at any appointment. Keep it safe and photograph every completed page as a backup.
Will my baby need blood tests at the U-checks?
A heel-prick blood test is taken at U2 for the extended newborn metabolic screening. This single early test covers more than a dozen conditions and is the only routine blood draw in the standard U-check schedule. Subsequent checks rely on physical examination and developmental assessment. Additional blood work may be requested if the paediatrician identifies a specific concern, such as possible anaemia or an abnormal result from the newborn screen that needs confirmation.
Can I track U-check appointments in Cubby?
Yes. Cubby lets you log each U-check date, record your baby's measurements, add notes from the consultation, and set reminders for the next appointment. Keeping all health milestones in one place means you always have the information you need, whether you are preparing for a follow-up visit or simply looking back at how your baby has grown through the first year.
Track every U-check in Cubby
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