Reality Check

I am trying to write a story involving administration of hormones.

There is a lot of easily available information on the effects of various hormones.

What I have not been able to find is information on the effects of the withdrawal of hormones.

Scene: 13/14 year old boy is given estrogen in medically approved dosage for about 12 months. Physical developments proceed as expected. The treatment then stops. What would the physical effects be - psychological effects are part of the story.

Would the physical effects of withdrawal be substantially different for a mature male, say aged 30-35.

It is a given that actual results will vary greatly from person to person. I'm looking for general information.

Thanks for reading.