3V0052.01 Motor development: rolls onto her back (CF. note #19) 3/17/78; 1;23
Peggy is showing considerable motor development now. Starting yesterday, when left alone in her crib, she has been straining very hard to lift her head and succeeding (before collapse). By lifting her head, I mean raising it straight up by contracting her neck muscles. She gets even higher by raising herself on her arms — this permits her crown to be seen down to the eyes above the top of the crib bumper on a horizontal line.
For the first time, she rolled over on her back when put on her stomach. (She did so at least twice.) Robby took Peggy’s picture while straining to raise her neck and, after, suggested we keep a note book describing her development.