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Foundation Sciences · Embryology

Foetal Growth and Maturation

⏱️ 30 mins read 📖 Embryology 🎯 MLA Relevance: High

Foetal growth depends on genetic, nutritional and placental factors; deviations cause intrauterine growth restriction (IUGR) or macrosomia.

📌 Learning Objectives

  • Describe the underlying mechanism of Foetal Growth and Maturation.
  • Identify the key clinical features and complications of Foetal Growth and Maturation.
  • Outline the appropriate investigations and management of Foetal Growth and Maturation.
  • Discuss the implications for patients and families of Foetal Growth and Maturation.
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Curriculum Mapped
UK MLA Curriculum

📋 Overview

Growth is assessed by symphysis–fundal height and ultrasound biometry (BPD, HC, AC, FL). Symmetrical IUGR suggests early insult (e.g. chromosomal, infection); asymmetrical suggests later insult (e.g. placental insufficiency).

🔬 Basic Science

Growth is assessed by symphysis–fundal height and ultrasound biometry (BPD, HC, AC, FL). Symmetrical IUGR suggests early insult (e.g. chromosomal, infection); asymmetrical suggests later insult (e.g. placental insufficiency).

🏥 Clinical Relevance

Macrosomia is associated with maternal diabetes and increases risk of shoulder dystocia.

🧪 Investigations

Investigation depends on clinical context: relevant blood tests, imaging, and specific genetic or histopathological tests as appropriate. Refer to specialist services where indicated.

💊 Management

Management is condition-specific and typically multidisciplinary, combining medical therapy, surgical intervention where appropriate, supportive care, and family/genetic counselling.

Revision Resources – expand the sections below for high-yield notes, exam pearls, key facts and further reading.

🎯 MLA High-Yield Notes & Quick Revision ⌄
Common SBA themes: recognising the underlying mechanism, identifying classic clinical features, and choosing the first-line investigation or management step. Watch for inheritance pattern and characteristic associations.
fetal growth iugr macrosomia doppler biometry
  • Symmetrical IUGR suggests early-onset insult (chromosomal, infection).
  • Asymmetrical IUGR with head sparing suggests placental insufficiency.
  • Umbilical artery Doppler with absent or reversed end-diastolic flow indicates severe compromise.
  • Macrosomia (>4 kg) is associated with maternal diabetes.
  • Surfactant maturity is reached around 35 weeks of gestation.
⭐ Exam Pearls ⌄
⭐ High Yield
Symmetrical IUGR suggests early-onset insult (chromosomal, infection).
Asymmetrical IUGR with head sparing suggests placental insufficiency.
Umbilical artery Doppler with absent or reversed end-diastolic flow indicates severe compromise.
Macrosomia (>4 kg) is associated with maternal diabetes.
Surfactant maturity is reached around 35 weeks of gestation.
💡 Clinical Pearl
Fetal Growth: Macrosomia is associated with maternal diabetes and increases risk of shoulder dystocia.
⚠️ Exam Tip — Common Mistakes
Confusing the mechanism of Foetal Growth and Maturation with related conditions.
Missing classic clinical features of Foetal Growth and Maturation in SBA stems.
Failing to consider Foetal Growth and Maturation in the differential diagnosis.
🔑 Key Facts ⌄
Symmetrical IUGR suggests early-onset insult (chromosomal, infection).
Asymmetrical IUGR with head sparing suggests placental insufficiency.
Umbilical artery Doppler with absent or reversed end-diastolic flow indicates severe compromise.
Macrosomia (>4 kg) is associated with maternal diabetes.
Surfactant maturity is reached around 35 weeks of gestation.
🔗 Related Topics ⌄
📚 Placental Function 🔬 Foetal Circulation Foundation Sciences → 📚 Antenatal Care
📚 References ⌄
  1. GMC MLA Content Map
  2. NICE Clinical Knowledge Summaries
  3. BMJ Best Practice

Further Resources

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