3d early stage embryo, stem cell research, morula. human or animal cells. medicine scientific concept.

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