If آپ mean from gymnastics, then once she had the baby and came back, she would be too old and her body would have changed to much to ever be as good as she was before
Umm well for purposes of the دکھائیں I think she chose to leave because it was easier for her to deal with everything. a pregnant girl can't do gymnastics, plus going through the pregnancy is going to make her body undergo changes so even after she has it she'll never be able to do gymnastics like she did.
Plus it was a way to have the character not be there since the actress actually had a baby, lol.
Emily left because when she was ہوم packing her friend kaylie came and کہا her and Damon kissed so she decided to have the baby but live with her step mother and that was the end and she never came back