[Association between HSD11B2 gene polymorphism and fetal growth]

Area of Science:

• Genetics
• Obstetrics
• Fetal Development

Background:

• The HSD11B2 gene plays a crucial role in regulating cortisol levels in the placenta.
• Polymorphisms in HSD11B2 may potentially affect placental function and fetal growth.
• Understanding these genetic influences is important for normal pregnancy outcomes.

Purpose of the Study:

• To investigate the association between HSD11B2 gene polymorphisms and fetal growth parameters.
• To determine if maternal or fetal HSD11B2 genetic variations impact birth weight and fetal development during normal pregnancy.

Main Methods:

• Genotyping of HSD11B2 promoter variants (G-209A, G-194C, G-151A, G-126A) using gene sequencing in 33 Chinese Han subjects.
• Analysis of HSD11B2 (CA)n microsatellite polymorphism in 187 maternal-newborn pairs via PCR-capillary electrophoresis.
• Statistical analysis correlating genotypes with birth weight and ultrasound-derived fetal growth parameters, adjusting for confounding factors.

Main Results:

• All examined HSD11B2 promoter genotypes were wild-type (GG).
• No significant differences in offspring birth weight or fetal body shape parameters were observed between different maternal or fetal HSD11B2 (CA)n genotype groups.
• After adjusting for confounding factors like gestational age, newborn gender, and maternal pre-pregnancy BMI, HSD11B2 polymorphisms remained unassociated with fetal growth.

Conclusions:

• Maternal and fetal HSD11B2 gene polymorphisms are not significantly related to fetal growth during normal pregnancy.
• The studied HSD11B2 genetic variations do not appear to be a determining factor in fetal development or birth weight in this population.
• Further research may explore other genetic or environmental factors influencing fetal growth.