Birth stage three, which begins after the birth of the baby, further contractions expel the placenta, amniotic sac, and the remaining portion of the umbilical cord usually within a few minutes. Enormous changes take place in the newborn's circulation to enable breathing in air. In the uterus, the unborn baby is dependent on circulation of blood through the placenta for sustenance including gaseous exchange and the unborn baby's blood bypasses the lungs by flowing through the foramen ovale, which is a hole in the septum dividing the right atrium and left atrium. After birth the umbilical cord is clamped and cut,
The Umbilical Brothers extensive use of their particular style of mime and humour. In December 2006, in a "New York Post" interview, Shane Dundas expressed doubts about the return of the show for a second season. In June 2007, Nickelodeon announced that they would not renew it for a second season. The two had voice roles in "Maya the Bee" as ant soldiers, with Collins voicing Arnie and Dundas voicing Barney. The Umbilical Brothers have performed six shows, four of which appear as DVDs: The Umbilical Brothers Shane Dundas and David Collins known as The Umbilical Brothers are an Australian comic duo. Dundas