A comparison of umbilical artery Doppler during second trimester of pregnancy between advanced maternal age less than 35 years old

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

TCTR

Registry ID

TCTR20220105001

Enrollment

175

Registered

2022-01-05

Start date

2022-01-05

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

umbilical artery Doppler of fetus GA 18-24 weeks umbilical artery Doppler, advanced maternal age

Interventions

maternal age more than 35 years, maternal age less than 35 years old

Screening,Screening

advanced maternal age,maternal age less than 35 years old

Eligibility

Sex/Gender

Female

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: 1. singleton 2. correct gestational age 3. maternal age more than 18 years

Exclusion criteria

Exclusion criteria: 1. abnormal placenta and umbilical cord 2. pregnancy with vascular disease 3. fetal chromosomal abnormality 4. smoking

Design outcomes

Primary

Measure	Time frame
difference of umbilical artery PI between advanced maternal age and maternal age less than 35 years at delivery abnormal umbilical artery Doppler	—

Secondary

Measure	Time frame
SGA at delivery neonatal weigh less than 2500 grams	—

Countries

Thailand

Contacts

Public ContactAtiporn Chaiwong

Bhumibol hospital

atiporn.pon@gmail.com0651954915

Outcome results

None listed

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