Maternal serum alpha-fetoprotein levels in multiple pregnancy.

Area of Science:

• Obstetrics and Gynecology
• Maternal-Fetal Medicine
• Biochemistry

Background:

• Maternal serum alpha-fetoprotein (AFP) screening is a key diagnostic tool in prenatal care.
• Elevated AFP levels can indicate fetal abnormalities, but also multifetal gestation.
• Distinguishing between these causes is crucial for appropriate clinical management.

Purpose of the Study:

• To compare maternal serum AFP levels in multiple pregnancies (twins and triplets) versus singleton pregnancies.
• To assess the impact of multifetal gestation on AFP levels.
• To provide guidance on interpreting elevated AFP in the context of multiple births.

Main Methods:

• Maternal serum AFP levels were measured at a specific gestational time.
• Data from 10 twin pregnancies and 1 triplet pregnancy were compared to 22 matched singleton pregnancies.
• Matching criteria included maternal age, parity, and gestational age at sampling.

Main Results:

• Average AFP levels in twin pregnancies were approximately double those in singleton pregnancies.
• The triplet pregnancy showed even higher AFP levels than twin pregnancies.
• A clear trend of increasing AFP levels with a higher number of fetuses was observed.

Conclusions:

• Multiple pregnancies (twins, triplets) are associated with significantly elevated maternal serum AFP levels.
• Routine ultrasound investigation should be performed first to identify multifetal gestations.
• This approach can prevent unnecessary amniocentesis for suspected neural tube defects in cases of multiple pregnancy.