AGTSP. It is a strange occurence, but may be it was according to Srimad Bhagwatam. The baby before birth in the womb can hear vedic mantras. As I regularly chant 'Nrsimha Kavacha' to my wife who is pregnant, she feels the kick of the baby always during this. The baby remains normal during the day time but when I chant Nrsimha Kavacha he starts kicking.
Even when yesterday my wife left for her mothers place for the 3rd trimester, I have recorded my Nrsimha Kavacha in iPhone and gave it to my wife to listen to it. Strange that whenever she plays it the baby starts kicking her.
So true is Krishna's mercy on every one.