Dr. winters is considered one of the most prominent obstetricians in town. she has just delivered her one thousandth baby. dr. winters feels that this delivery is just as emotionally satisfying as the first. she is successfully progressing through the stage of development in erikson's model of development.

The answer is "Generativity versus stagnation" stage of development.

Generativity versus stagnation is the seventh of eight phases of Erik Erikson's hypothesis of psychosocial advancement. This stage happens amid center adulthood between the periods of around 40 and 65. 
Generativity alludes to "making your stamp" on the world through watching over others and also making and achieving things that improve the world a place. 
Stagnation alludes to the inability to figure out how to contribute. These people may feel detached or uninvolved with their group and with society overall.