A mother planned a gender reveal photo shoot to celebrate her 20-year-old son coming out as transgender.

>> Read more trending news

On a whim, Heather Green planned the photo shoot, an event usually for expectant mothers -- for her son Adrian Brown's birthday Jan. 29.

"There was no rule book for what a mom is supposed to do when their child comes to them and says, 'This is my truth,'" Green told WAVE. "This was just uncharted territory. And as much as I was wanting to support him, I was also wanting him to know that it wasn't just acceptance, or that I was going to put up with him -- I was going to celebrate it."

Green is pictured with a fake baby bump. Another image shows Brown in swaddling clothes with the words “It’s a boy” on them, a giant teddy bear is nearby. Others he is surrounded by balloons.

In September, Brown, formerly known as Hannah, came out to his mother and brother Lucas Brown, Yahoo News reported.

"The decision to come out was really scary," Adrian Brown told WAVE. "The hardest part was coming out to myself, accepting myself and loving myself for who I am."

Brown has had the full support of his family and found out the post has served as an inspiration to others.

"I thought this was sort of a struggle I had to do by myself. It's really heartwarming to see there are so many people out there who share the same story that I do and are so supportive of a complete stranger. And it gives me a lot of hope," Brown told WAVE. "I know a lot of people don't have the same level of support as I do, but knowing that I've got a support system like them -- it's amazing you know."