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Progeny, pregnancy and phenylketonuria
The New Zealand Medical Journal
|October 8, 1975
Summary
Phenylketonuria (PKU) in pregnant women poses significant fetal risks. Strict dietary control is crucial during pregnancy to prevent adverse outcomes for the baby.
Area of Science:
- Metabolic disorders
- Genetics
- Maternal-fetal medicine
Background:
- Phenylketonuria (PKU) is an inherited metabolic disorder.
- Untreated PKU can lead to intellectual disability.
- Maternal PKU requires careful management during pregnancy.
Observation:
- A 21-year-old woman with untreated phenylketonuria (PKU) became pregnant.
- Her blood phenylalanine levels were significantly elevated (23mg/100 ml).
- Dietary intervention was initiated at 10 weeks of gestation.
Findings:
- The low phenylalanine diet successfully lowered maternal blood phenylalanine levels to below 6mg/100ml.
- The baby was born with normal birth weight and skull size.
- The infant unfortunately died at 14 days due to congenital heart disease.
Implications:
- Pregnancy in women with phenylketonuria (PKU) carries substantial fetal risks.
- A growing population of women with PKU are entering reproductive age.
- Antenatal screening and heightened awareness are vital for managing maternal PKU risks.