Table 8.

Comparison with state-of-the-art approaches.

Method	Subjects	Age (days)	MAE (days)
Feature-based developmental model (51)	92	8–590	72
HRtoF model (46)	50	14–797	32.1
The proposed 3D CNN	88	4–697	28.9
The proposed 3D CNN	220	4–1,820	67.6