6 Weeks Pregnant - Pregnancy Week 6
By the 6th week of pregnancy, the fetus' heart has started beating and can often be seen early in the 6th week by transvaginal ultrasound. Baby is now about 1/17 of an inch in length and growing rapidly. If an ultrasound were to be performed this early in the pregnancy, baby would look like a round circle in the womb with a small nub on one side. The nub is the attachment point of the egg to the uterine lining. Buds are starting to develop that will later become the arms and legs. Moms pregnant with multiples will see the same progression by week 6.