How many types of cells do the 3 month old fetus have?

At three months of gestation, a fetus has developed a variety of cell types, primarily organized into three germ layers: ectoderm, mesoderm, and endoderm. These layers give rise to different tissues and organs, including skin, nervous system, muscles, and internal organs. By this stage, the fetus has also formed specialized cells, such as blood cells and nerve cells, indicating significant differentiation and development. Overall, the number of cell types is extensive and continues to increase as development progresses.