Successful Management of Two Consecutive Pregnancies With Maternal-Fetal Phenylketonuria: Lessons From Clinical...

Area of Science:

• Metabolic Disorders
• Genetics
• Maternal-Fetal Medicine

Background:

• Phenylketonuria (PKU) is an autosomal recessive disorder caused by phenylalanine hydroxylase (PAH) deficiency, leading to phenylalanine (Phe) accumulation and developmental risks.
• Current PKU management includes a Phe-restricted diet, amino acid supplements, and sometimes tetrahydrobiopterin (BH4) therapy.
• Pregnancy in PKU patients presents challenges including altered nutritional needs, stricter Phe control, and managing supplements, especially in rare maternal-fetal PKU (mfPKU) cases.

Purpose of the Study:

• To outline a successful management strategy for maternal-fetal PKU (mfPKU) pregnancies.
• To highlight the importance of a patient-centered approach and multidisciplinary collaboration in managing mfPKU.
• To provide insights into managing two consecutive mfPKU pregnancies based on practical experience.

Main Methods:

• Implementing a patient-centered approach with a focus on education and multidisciplinary metabolic team collaboration.
• Regular monitoring of maternal body weight, blood Phe levels, and calorie intake.
• Utilizing an online food diary for tailored recommendations on natural protein restriction and amino acid supplementation.

Main Results:

• Successfully managed two consecutive maternal-fetal PKU pregnancies.
• Demonstrated the feasibility of a tailored, patient-centered management plan for mfPKU.
• Showcased effective use of regular monitoring and dietary adjustments.

Conclusions:

• A structured, patient-centered approach is crucial for successful management of maternal-fetal PKU pregnancies.
• Close collaboration with a multidisciplinary metabolic team and continuous monitoring are key to optimizing outcomes.
• This strategy provides a framework for managing rare mfPKU cases, addressing unique challenges during gestation.