Uterus and cervix anatomical changes and cervix stiffness evolution throughout pregnancy

Area of Science:

• Biomedical Engineering
• Reproductive Biology
• Maternal-Fetal Medicine

Background:

• Accurate biomechanical modeling of pregnancy requires quantitative data on maternal anatomy and tissue properties across gestation.
• Detecting pregnancy complications like cervical insufficiency necessitates understanding normal biomechanical function.

Approach:

• Longitudinal measurements of uterine/cervical dimensions and cervical stiffness in 47 low-risk pregnancies using ultrasound and aspiration.
• Developed patient-specific computational solid models from ultrasound data to estimate uterocervical volume.
• Analyzed trends in anatomical measurements and tissue properties across four gestational time points.

Key Points:

• The uterus exhibits directional growth patterns, expanding fastest inferior-superiorly early in pregnancy and anterior-posteriorly/left-right later.
• Cervical softening and shortening accelerate during the second and third trimesters.
• Integrated maternal and fetal measurements provide patient-specific biomechanical data throughout gestation.

Conclusions:

• This study provides essential quantitative biomechanical data for pregnancy and childbirth simulations.
• Understanding these dynamic changes is vital for improving prenatal care and predicting pregnancy outcomes.
• The findings facilitate advanced 3D modeling for exploring pregnancy biomechanics.