# Gestational Age is Underestimated by Menstrual Dating Compared to Ultrasound Dating in Those Undergoing Abortion up to 20 Weeks

> **NCT00884403** · — · TERMINATED · sponsor: **University of British Columbia** · enrollment: 415 (actual)

## Conditions studied

- Abortion

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT00884403
- **Lead sponsor:** University of British Columbia
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** TERMINATED
- **Start date:** 2008-09
- **Primary completion:** 2009-06
- **Final completion:** 2009-06
- **Target enrollment:** 415 (ACTUAL)
- **Why stopped:** This study is a retrospective chart review study, not a clinical trial.
- **Last updated:** 2018-05-04

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00884403

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00884403, "Gestational Age is Underestimated by Menstrual Dating Compared to Ultrasound Dating in Those Undergoing Abortion up to 20 Weeks". Retrieved via AI Analytics 2026-07-28 from https://api.ai-analytics.org/clinical/NCT00884403. Licensed CC0.

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