When it comes to a girls menstruel cycle of a girl becomes pregnant, what day are you suppose to choose from your last menstruel cycle, does pregnancy start from the first day of bleeding of your cycle or is it the end of the cycle which was suppose to be a period but instead was a pregnancy. So saying normal if you have a 28 day cycle of you become pregnant say your cycle started on the first, do you count pregnancy from the first,’or is it the 28th at the end of the cycle?