When will my baby laugh

My daughter's always laughed, but it's a weird laugh, like she breathes in instead of out while laughing. well the other day (she's 2 months now) she finally had a normal laugh that we heard from the other side of the house. It was funny. she's done it one more time since then but still hasn't gotten the hang of it, I don't think

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About Kelsee
Born: Grand Prairie, Texas
Current: Grand Prairie, Texas
Birth: October 10
On Moms.com since: Mar 16, 2014