“In fact, between 6 and 10 weeks’ gestation, the embryo grows into a fetus, from the size of a baked bean to the size of a prune. In many cases, they are, in fact, visible to the naked eye.

With each week of pregnancy, your baby-to-be is developing in leaps and bounds. In the early stages, they are called a zygote. They then progress to an embryo, fetus, and finally, baby. You might ...

Week 3. Baby: Congratulations!If your egg and your partner's sperm have joined successfully, your embryo is really there, although it's very small -- about the size of the head of a pin.

Screenshots from the first real-time video of early embryonic development. Fluorescent markers were used to show the movement of the filaments inside embryonic cells.

“In fact, between 6 and 10 weeks' gestation, the embryo grows into a fetus, from the size of a baked bean to the size of a prune. In many cases, they are, in fact, visible to the naked eye.