The training of prolactin is usually to learn theory before practice, which depends on the individual's learning ability and comprehension ability.

Usually 1-3 months so that you can finish your studies before you study.

My sister usually takes care of her children during lactation in Shenzhen Bain, and only goes to school in her spare time. She finished her studies in about two months and got the certificate. So sometimes you don't learn fast enough to see your own.