Baby: Week 29
Bones are fully formed now, and your body begins storing iron, calcium, and phosphorus
You almost fill the uterus, but may still have a small bit of room to turn somersaults. You weigh about 1.5kg and measure about 41cm. Your arms, legs and body are finally proportional to your head. You will gain about another 900g before birth.
Bones are fully formed now, and your body begins storing iron, calcium, and phosphorus. During these weeks, body fat increases rapidly. 
WebMD discusses week 30 of pregnancyfind out more
Langmans Medical Embryology, Ninth Edition, TW Sadler, 2003find out more
University of Maryland Medical Encyclopediafind out more