When to consider prenatal massage therapy?

Hey!! Does anyone here know when exactly should one consider prenatal massage therapy? I'm in the second trimester and I'm advised to undergo prenatal massage therapy from a clinic in Toronto ( http://www.physiomobility.com/pre-natal-massage.h… ) to reduce labor pain, stress, anxiety, back pain, joint pain and leg cramps.
I have researched and found that it's safe to undergo this therapy but I couldn't find when exactly should one consider prenatal therapy. Any suggestions are appreciated. Thanks!!

About Karen
Birth: December 31
On Moms.com since: May 31, 2017
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