38 weeks pregnant first baby, is there a chance that she changes from a breech position? have been doing several exercises over the past few weeks

It happens: The space limitations late in pregnancy make position change unlikely at 38 wks, but it happens. Some docs may set up to try a "version" maneuver, to change the position, but this is usually done at the hospital with the operating room ready for an urgent c-section. The maneuver is not without risks for mom and baby.

Possible!: Breech is when the baby's head isn't pointing down to the cvx/vagina. Frank/footling meanthe baby's feet are either tucked up to its head/dangling down to the vagina. Many reasons why; sometimes baby's size, shape of uterus, rarely it's babies w/ a neuro disorder. >50% switch to cephalic at 32wks, and it even happens at 38wks. OBGYNs can perform a version to flip baby at term, but DON'T TRY @ HOME