Description

Examine the 12-week human embryo with this precise 3D model, representing the close of the first trimester. The body appears more proportional as limb growth accelerates, and fine details such as fingernails and toenails emerge. External genitalia become more distinct, allowing early differentiation of sex. This period is characterized by the beginning of active fetal movements, though not yet felt by the mother. It provides learners with a valuable visualization of how external morphology, organ maturation, and skeletal development advance together at this stage.