World of Biology on Instagram: "This 3D animation showcases fetal development from the moment of conception through the fourth week after fertilization. It features stunning visuals, including an external view of the cervix, a perspective from inside the uterus, the fallopian tube, as well as detailed depictions of eggs—both outside the outer membrane and within the nucleus. The animation beautifully captures key milestones: the zygote dividing and traveling, the blastocyst continuing its divisi