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.
Time Frame. A baby develops a heartbeat early in the first trimester. The first trimester is the first 12 weeks of pregnancy as measured by the first day of the last period, according to MayoClinic.com. These early weeks are marked by intense hormonal changes in the womanâs body and rapid growth in the babyâs body.ime Frame. A baby develops a heartbeat early in the first trimester. The first trimester is the first 12 weeks of pregnancy as measured by the first day of the last period, according to MayoClinic.com. These early weeks are marked by intense hormonal changes in the womanâs body and rapid growth in the babyâs body.