Reference Ranges of Fetal Mandible Measurement: Inferior Facial Angle, Jaw Index, Mandible Width/Maxilla Width Ratio and Mandible Length in Thai Fetuses at 15 to 23 Weeks of Gestation

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

TCTR

Registry ID

TCTR20210602003

Enrollment

330

Registered

2021-06-02

Start date

2020-04-01

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Reference range of Fetal mandible in singleton, low-risk pregnant women at 15 to 23 weeks of gestation Reference Range

Interventions

singleton pregnant women at gestational age 15 to 23 weeks

Health Services Research

singleton pregnant women

Eligibility

Sex/Gender

Female

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: Singleton pregnant women at 15(0/7) to 23(6/7) weeks of gestation

Exclusion criteria

Exclusion criteria: - multifetal gestation - congenital anomaly - chromosomal abnormality - fetal growth restriction - abnormal amniotic fluid volume - suspected fetal abnormality of mandible, maxilla or jaws based on the proposed criteria from previous studies (IFA < 49.2 degree, jaw index < 23, MD/MX ratio < 0.785 or ML < -2SD)

Design outcomes

Primary

Measure	Time frame
inferior facial angle at the time of measurement (GA 15-23 weeks) degree,jaw index at the time of measurement (GA 15-23 weeks) -,mandible/maxilla ratio at the time of measurement (GA 15-23 weeks) -,mandible length at the time of measurement (GA 15-23 weeks) millimeters	—

Secondary

Measure	Time frame
none none none	—

Countries

Thailand

Contacts

Public ContactPichaya Booncharoen

MFM OBGYN Faculty of Medicine Prince of Songkla University

bpichaya@medicine.psu.ac.th66815378828

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026