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Sonar biparietal diameter growth standards in the rhesus monkey
American Journal of Obstetrics and Gynecology
|February 1, 1975
Summary
Serial sonar fetal cephalometry in monkeys reveals a consistent percentile growth pattern for biparietal diameter (BPD). Fetuses remain within their initial percentile range, aiding in distinguishing normal from suboptimal intrauterine growth.
Area of Science:
- Veterinary Medicine
- Primate Reproduction
- Fetal Development
Background:
- Accurate assessment of fetal growth is crucial for reproductive success in non-human primates.
- Previous studies have not established consistent percentile-based growth trajectories for fetal biparietal diameter.
Purpose of the Study:
- To construct a normal biparietal diameter (BPD) growth curve for Macaca mulatta fetuses.
- To investigate the percentile distribution of fetal growth and its consistency over time.
Main Methods:
- Serial sonar fetal cephalometry was conducted on 67 pregnant Macaca mulatta with known breeding dates.
- A biparietal diameter (BPD) growth curve was established and divided into four percentile ranges (10th-24th, 25th-49th, 50th-74th, 75th-90th).
Main Results:
- A normal biparietal diameter (BPD) growth curve was successfully constructed.
- Fetuses consistently maintained their initial percentile growth range throughout gestation under normal conditions.
- This consistent percentile growth phenomenon was not previously documented.
Conclusions:
- The consistent percentile growth of fetal biparietal diameter in Macaca mulatta is a significant biological finding.
- This phenomenon allows for a more precise differentiation between normal and suboptimal intrauterine growth.
- The study provides a valuable tool for monitoring fetal well-being in primate research.