Your little sweet pea is practically gargantuan compared to just a couple of weeks ago, when he was still invisible to the naked eye. Measuring about a quarter to a half-inch from head to rump, his head is his dominant feature. The rest of his body is making strides to catch up, thanks to budding arms and legs, which will eventually give rise to 10 sweet little fingers and 10 equally perfect toes. His facial features, like his eyes, nostrils and ears, are also beginning to make an appearance. In fact, those baby blues (or browns, or greens) are well on their developmental way, each sporting a lens, cornea, retina and iris by the end of this week. His wee intestines and lungs are beginning to take shape, and his brain, heart and other vital organs are maturing at a significant pace.