3d early stage embryo. morula is an early stage embryo consisting of cells. stem cell research and

artificial background bacteria bio biology biotechnology blastocyst cell cleavage clone cloning conception diploid division dna egg embryo embryogenesis embryology embryonic fertility fertilization four gamete genes genetic health human illustration insemination macro magnification microscope microscopic mitosis morula nucleus oocyte ovum procreation render reproduction reproductive research science stem zygocyte zygote