Our Appleseed - 5w2d

Week 5, but 6th week...confused yet?

thebump.com:
Your embryo (looking kind of like a tadpole) is starting to form major organs (heart, kidney, liver, stomach) and systems (nervous, circulatory, digestive). Baby's presence in your uterus triggers production of hCG (the hormone detected by pregnancy tests)... which triggers production of other hormones like estrogen and progesterone... which trigger all those great symptoms you've probably been noticing!

fitpregnancy.com:
Your baby and the yolk sac are about the size of an M&M's candy. A month after conception, your embryo looks something like a newt or a tadpole, and it has gills like a fish! Right now, the embryo of your future baby looks much like the embryo of any other animal—a bird, rabbit, or monkey. It has two tiny cups of pigment on the side of its head that will develop into eyes. Tiny buds that will form the lungs have appeared. The neural tube has closed. One end is flattening and expanding to become the brain, and the other end will become the spine. It's already 10,000 times larger than the fertilized egg. The embryo doesn't have gender characteristics yet, but has little dots where the nipples will be, whether it's a boy or a girl. The heart, a tiny U-shaped tube, will start beating between days twenty-one and twenty-four and is circulating the embryo's own blood. It has a small mouth and lips and fingernails are forming.