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Related Experiment Video

Updated: Feb 9, 2026

Long-term Behavioral and Reproductive Consequences of Embryonic Exposure to Low-dose Toxicants
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[Application of benchmark dose method in reproduction/developmental toxicity screening test].

Min Zheng1, Wenjin Zhao1, Juan Cheng1

  • 1National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing 100050, China.

Wei Sheng Yan Jiu = Journal of Hygiene Research
|June 16, 2018
PubMed
Summary

This study determined the benchmark dose (BMD) for reproductive and developmental toxicity in rats exposed to a nitrile compound. The BMD lower confidence limit (BMDL) was 17.8 mg/kg BW, indicating potential risks at higher exposure levels.

Keywords:
benchmark dosenested datanon-observed adverse effect levelreproduction/developmental toxicity

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Area of Science:

  • Toxicology
  • Reproductive Toxicology
  • Developmental Toxicology

Background:

  • Reproductive and developmental toxicity studies are crucial for assessing chemical safety.
  • Establishing reliable dose-response relationships, such as benchmark dose (BMD), is essential for risk assessment.

Purpose of the Study:

  • To estimate the benchmark dose (BMD) and its lower confidence limit (BMDL) for reproductive/developmental toxicity.
  • To compare BMDL values with the no-observed-adverse-effect level (NOAEL) for a nitrile compound.

Main Methods:

  • 120 Sprague-Dawley rats were administered a nitrile compound orally for 54 days at varying doses.
  • Reproductive parameters, pup viability, and developmental endpoints were meticulously observed.
  • Benchmark Dose Software (BMDS 2.6) was utilized for data analysis and BMDL estimation.

Main Results:

  • Significant decreases in female rat food consumption and body weight were observed at high doses.
  • Increased implantation loss rates were noted in medium and high-dose groups.
  • The NOAEL was determined to be 12.5 mg/kg BW, with a BMDL of 17.8 mg/kg BW for implantation loss.

Conclusions:

  • The benchmark dose lower confidence limit (BMDL) for reproductive/developmental toxicity was estimated at 17.8 mg/kg BW.
  • This BMDL provides a more refined measure for risk assessment compared to the NOAEL.