Technology Development of Diagnostic Ultrasound System for Obstetric Imaging

Inclusion Criteria: To be eligible to participate in this study, an individual must meet all of the following criteria: 1. Pregnant persons age 18-45 years 2. Single intrauterine pregnancy 3. Gestational duration: 18 - 28 weeks Exclusion Criteria: An individual who meets any of the following criteria will be excluded from participation in this study: 1. Pregnant individuals with multi-fetal gestation (e.g., twins, triplets, etc.). 2. Pregnant individuals with suspected or known fetal anomaly, undergoing evaluation for genetic abnormality, requiring non-standard care, or diagnostic intervention. 3. Pregnant individuals with a medical or surgical history that may impact quality of ultrasound imaging: * Body Mass Index (BMI) \> 40 * Prior surgeries including: abdominal mesh placement; abdominoplasty * Vaginal bleeding within the last 6 weeks 4. Patients with serious medical comorbidities including: maternal congenital heart abnormalities; history of organ transplant; asthma exacerbation (during pregnancy); pre-eclampsia; recent mechanical trauma. 5. Use of any of the following during pregnancy: marijuana (or similar derivatives); alcohol; tobacco; methamphetamines; warfarin; isotretinoin; methotrexate; valproic acid; retinoids; oral steroids 6. Non-English speaking. 7. Participants deemed unsuitable by the investigator due to safety or data integrity.