1 Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes. 2  This is the American ICD-10-CM version of J11.1. 3  Other international ICD-10 versions may differ.
It takes approx. 36-40 weeks for the baby to be fully developed. Before that, the baby is premature and might have to spend some time in an incubator.
At the end of 12 weeks: 1  Fetus is 2-1/2 to 3 inches long. 2  Weighs about 1/2 to 1 ounce. 3  Nails start to develop and earlobes are formed.  Fetus develops recognizable 1  form. Arms, hands, fingers, legs, feet and toes are fully formed.  Eyes are almost fully 1  developed. By this stage, a fetus has developed most of his/her organs and tissues.