Description

Observe the 13-week human embryo in this detailed 3D model, marking the early second trimester. The head now constitutes a smaller proportion of total body size, and the profile looks increasingly human-like. Eyelids remain fused, but facial features such as nose and lips become more pronounced. Limbs lengthen further, with coordinated movements occurring regularly. The model also highlights bone ossification, visible skin vessels, and developing hair follicles. This stage is crucial for understanding the transition from early fetal morphogenesis toward steady growth and functional specialization.