How well formed is the baby at 6 weeks and 2 days pregnant?

During the sixth week of pregnancy, the baby is the size of a BB pellet and resembles a tadpole in shape, according to WebMD. Its arms, legs and eyes are beginning to form, and its heartbeat might be detectable on an ultrasound.

As the pregnancy progresses into the seventh week, the baby continues to grow. Its limbs sprout hands and feet, and other organs and body parts, such as the heart, lungs, appendix, intestines, spinal cord, brain, nostrils and mouth, begin forming, notes WebMD. The mother-to-be might experience the beginning of morning sickness during the sixth week, and she might already have gained a few pounds.