胎児

1. Origins, structure, and basic meaning

• Structure: 胎児 is read as たいじ and is a noun for a fetus developing in the uterus before birth.
• Basic usage: Learning fetal growth from a model appears in 胎児の成長を模型から学ぶ, while the fetus being shown at each stage appears in 胎児の姿が段階ごとに描かれる.

2. Common pitfalls and similar expressions

• A term for development before birth
  • It is used in health and biology materials to describe growth and appearance before birth.
• Difference from 赤ちゃん
  • Unlike the affectionate everyday word for a baby, this is a medical and biological term for a fetus before birth.