Triple-test screening in in vitro fertilization pregnancies.

Area of Science:

• Reproductive Medicine
• Prenatal Diagnostics
• Biochemistry

Background:

• Triple-test analysis is a common method for prenatal screening.
• In vitro fertilization (IVF) is a widely used assisted reproductive technology.
• Understanding differences in biochemical markers between spontaneous and IVF pregnancies is crucial for accurate prenatal diagnosis.

Purpose of the Study:

• To compare the results of triple-test analysis between spontaneous and IVF pregnancies.
• To investigate potential differences in maternal serum levels of alpha-fetoprotein (AFP), human chorionic gonadotropin (HCG), and unconjugated estriol (u-E3).

Main Methods:

• A cohort of 140 women with singleton pregnancies was studied, with 70 conceived via IVF and 70 spontaneously.
• Groups were matched for maternal age, gestational week, and laboratory batch.
• Maternal serum levels of AFP, HCG, and u-E3 were measured and compared between the groups.

Main Results:

• Significantly higher maternal serum HCG levels were observed in the IVF group compared to the spontaneous conception group (p < 0.006).
• No significant differences were found in AFP or u-E3 levels between the two groups.
• While the overall screen-positive rate was not statistically different, fewer IVF pregnancies achieved the lowest possible risk score (1:9999) compared to spontaneous pregnancies (p < 0.05).

Conclusions:

• The findings confirm elevated maternal serum HCG levels in IVF pregnancies relative to spontaneous pregnancies.
• These HCG level differences may influence the interpretation of triple-test results in IVF pregnancies.
• Further research may be needed to refine prenatal screening protocols for IVF conceptions.