@ 21 Days
Yes, its hard to imagine, but your tiny heart started to beat at 21 days and has been beating ever since. By 4 weeks, your heart typically beat between 105 and 121 times per minute
Yes, its hard to imagine, but your tiny heart started to beat at 21 days and has been beating ever since. By 4 weeks, your heart typically beat between 105 and 121 times per minute