bow leg concerns

Daughter is 7 half mths now. And she’s very excited abt standing up by herself. I have concerns that children may have bow legs if they are exposed to standing for too long. I’ve already restricted her activity center time to 15mins a day in fear of this, she’s crawling in the play pen most of the time. Actually more often than not, she’s not crawling but standing by the side of the play pen. Do share with me your thoughts and how I shld handle this. Thanks.