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Related Experiment Video

Updated: Jun 6, 2026

Anogenital Distance and Perineal Measurements of the Pelvic Organ Prolapse (POP) Quantification System

Anogenital Distance and Perineal Measurements of the Pelvic Organ Prolapse (POP) Quantification System

Published on: September 20, 2018

Reference values for Japanese fetal penile length.

Toshiyuki Hata^1,2, Yume Takahashi³, Miyu Konishi³

¹Department of Obstetrics and Gynecology, Miyake Clinic, 369-8 Ofuku, Minami-Ku, Okayama, 701-0204, Japan. hata.toshiyuki@kagawa-u.ac.jp.

Journal of Medical Ultrasonics (2001)

|June 5, 2026

Summary

This summary is machine-generated.

This study establishes reference values for Japanese fetal penile length using ultrasound. These findings aid in the accurate prenatal diagnosis of penile abnormalities in Japan.

Keywords:

Japanese male fetus Penile length Reference value Ultrasound

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Last Updated: Jun 6, 2026

Anogenital Distance and Perineal Measurements of the Pelvic Organ Prolapse (POP) Quantification System

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Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction

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Published on: June 29, 2013

Area of Science:

Prenatal Medicine
Fetal Development
Medical Imaging

Background:

Accurate fetal measurements are crucial for prenatal diagnostics.
Establishing normative data for specific populations is essential for identifying deviations.
Fetal penile length is an important parameter for assessing male fetal development.

Purpose of the Study:

To establish reference values for Japanese fetal penile length.
To utilize ultrasonography for measurements at 18-21+6 and 28-31+5 weeks of gestation.
To provide data supporting prenatal diagnosis of penile abnormalities.

Main Methods:

Sonographic measurement of outer penile length (OPL) in 305 male fetuses.
Measurements taken at two gestational age windows: 18-21+6 and 28-31+5 weeks.
Assessment of intra- and inter-observer agreement for OPL measurements.

Main Results:

Fetal penile length demonstrated a positive correlation with gestational age at both measurement points.
Excellent intra- and inter-observer reproducibility for OPL measurements was confirmed.
High intra- and inter-correlation coefficients indicate reliable OPL assessment.

Conclusions:

The study provides normative reference values for Japanese fetal penile length.
These reference values can enhance the accuracy of prenatal diagnoses for conditions like hypospadias, micropenis, and buried penis.
This data is particularly valuable for obstetricians and sonographers in Japan.