what are some trust excersises to do with my mare?

[Animal_lover]

i have an untrustful pony mare that i will breed soon, however i understand that a baby mimmicks the mother for the first most important months of his life, what are some excersises that will allow my mare to trust me more and want to come and be around me, i do give her treats in a feed bucket, but she usually doesnt like me after she eats her grain, so while she is pregnant i want to do some slow easy nice excersises for her to follow me so when she has the baby she will not be scared that i will hurt him and will be a better example for the baby, and allow me to touch him/her.
thank you so much.