Tiny bumps are beginning to bulge where arms and legs will form. A week later, the embryo has grown to the size of a bean, the limb buds will have grown into little paws. The head has enlarged to accommodate the rapidly growing brain. The arms and hands become recognizable before the legs. From the third month on, all sorts of finishing touches will be put on.
Fingernails appear around the ninth week.
Eyelids, formed at the beginning of the third month, seal the eyes shut like a newborn kitten's until their development is completed. Lips form, cheeks fill out, taste buds develop on the tongue, and salivary glands come into being. The sex organs begin to produce the primitive eggs and male germ cells that are the seeds of the next generation - even as a woman is becoming a mother, her baby is preparing to make her a grandmother.