What counts as day 1 of period?
What counts as day 1 of period? Day 1 of your cycle is the first day of your period, meaning the first day of full flow (spotting doesn't count). During this time, the uterus sheds its lining from the previous cycle. Between days 1 – 5 of your cycle, new follicles (sacs of fluid containing eggs) begin to develop within your ovaries.
What is a period for boys?
Unlike the female reproductive system, boys do not have uterus and thus menstruation cannot occur. Therefore, it is biologically impossible for boys to have periods. However, boys during puberty may undergo mood swings or other emotional changes due to changing levels of the male sex hormone testosterone.