Labor patterns of spontaneous first-stage labor in Chinese women with normal neonatal outcomes.

Background: Friedman's standards, developed almost 50 years ago, may no longer align with the needs of today's obstetric population and current pregnancy management practices. This study aims to analyze contemporary labor patterns and estimate labor duration in China, focusing on first-stage labor data from Chinese parturients with a spontaneous onset of labor.

Methods: This retrospective observational study utilized data from electronic medical records of a tertiary hospital in Changsha, Hunan.

[Ultra-high performance liquid chromatography-orbitrap high-resolution mass spectrometry for rapid screening and identification of 32 illegally added drugs in slimming and anti-impotence health foods].

A novel method based on ultra-high performance liquid chromatography-orbitrap high-resolution mass spectrometry (UHPLC-Orbitrap HRMS) was developed for the rapid screening and confirmation of 32 illegally added drugs in slimming and anti-impotence health foods. In addition, the key points of the database establishment and application are summarized. This research focused on the derivatives of illegally added drugs.