Reference values for Japanese fetal penile length.

IF 2.1 4区医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Journal of Medical Ultrasonics Pub Date : 2026-06-05 DOI:10.1007/s10396-026-01651-7

Toshiyuki Hata, Yume Takahashi, Miyu Konishi, Aya Koyanagi, Yasunari Miyagi, Takahito Miyake

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引用次数: 0

Abstract

Purpose: To determine reference values for Japanese fetal penile length using ultrasonography at 18-21 + 6 as well as 28-31 + 5 weeks of gestation.

Methods: Three hundred and five pregnant women were enrolled in the study, and fetal penile length was measured at both 18-21 + 6 and 28-31 + 5 weeks of gestation. All 305 fetuses were successfully measured. Outer penile length (OPL) of the male fetus was measured, and OPL reference values were determined. Intra- and inter-observer agreements regarding OPL were also assessed with Bland-Altman plots and intra- and inter-correlation coefficients.

Results: OPL showed an increasing trend with advancing gestation at 18-21 + 6 (r = 0.2757, p < 0.001) and 28-31 + 5 (r = 0.2306, p < 0.001) weeks. Intra- and inter-reproducibilities of OPL were excellent. Intra- and inter-correlation coefficients of OPL were 0.982287 and 0.885602, respectively, at 18-21 + 6 weeks, and 0.994104 and 0.97343, respectively, at 28-31 + 5 weeks.

Conclusion: Our results provide reference values for Japanese fetal penile length, which may promote accurate prenatal diagnoses of hypospadias, micropenis, and buried penis in Japan.

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日本胎儿阴茎长度参考值。

目的：探讨妊娠18-21 + 6周和28-31 + 5周日本胎儿阴茎长度的超声参考值。方法：入选孕妇305例，分别于妊娠18-21 + 6周和28-31 + 5周测量胎儿阴茎长度。所有305例胎儿均成功测量。测定男性胎儿阴茎外长（OPL），确定OPL参考值。还用Bland-Altman图和内部和相互相关系数评估了关于OPL的观察者内部和观察者之间的协议。结果：OPL在18 ~ 21 + 6妊娠期呈增加趋势（r = 0.2757, p）。结论：本研究结果对日本胎儿阴茎长度有一定的参考价值，可促进日本胎儿尿道下裂、小阴茎和隐埋性阴茎的准确产前诊断。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Medical Ultrasonics 医学-核医学

CiteScore

3.30

自引率

11.10%

发文量

102

审稿时长

>12 weeks

期刊介绍： The Journal of Medical Ultrasonics is the official journal of the Japan Society of Ultrasonics in Medicine. The main purpose of the journal is to provide forum for the publication of papers documenting recent advances and new developments in the entire field of ultrasound in medicine and biology, encompassing both the medical and the engineering aspects of the science.The journal welcomes original articles, review articles, images, and letters to the editor.The journal also provides state-of-the-art information such as announcements from the boards and the committees of the society.