Fetal development in relation to gestational age in the piglet

Area of Science:

• Veterinary Medicine
• Developmental Biology
• Animal Science

Background:

• Accurate determination of gestational age is crucial for understanding fetal development and optimizing animal management.
• Cesarean-derived piglets offer a controlled model for studying prenatal development.

Purpose of the Study:

• To evaluate the efficacy of body and organ weights as predictors of gestational age in piglets.
• To assess the added value of organ weight data when mean litter weight is already known.

Main Methods:

• Body and organ weights were recorded from 44 litters of piglets delivered via cesarean section.
• Piglets were sampled across the final 20 days of gestation.
• Statistical correlation analysis was performed between weights and gestational age.

Main Results:

• A highly significant correlation was observed between mean litter weight and gestational age.
• Using mean litter weight alone results in considerable uncertainty; 95% confidence intervals were +/- 10.2 days at 1 kg mean litter weight.
• Organ weight data provided no additional predictive information beyond mean litter weight.

Conclusions:

• Mean litter weight is a significant but imprecise predictor of gestational age in piglets.
• Incorporating organ weights does not enhance the accuracy of gestational age prediction.
• Further research may be needed to identify more precise methods for estimating gestational age in porcine models.