Contractions begin and the cervix gradually opens. See the stages of labor and watch a baby…
Címke: placenta
Life Before Birth – In the Womb
Subscribe to Naked Science - http://goo.gl/wpc2Q1 Every other Wednesday we present a new video, so join…
Contractions begin and the cervix gradually opens. See the stages of labor and watch a baby…
Subscribe to Naked Science - http://goo.gl/wpc2Q1 Every other Wednesday we present a new video, so join…