The Truth About Period Syncing and Why You May Be Experiencing It
Women's Wellness: Female athletes and their periods
Yet she will be saved through childbearing—if they continue in faith and love and holiness, with self-control.
This bleeding is lighter than a normal period, however, and only lasts for a couple of days.
Sometimes people's cycles are shorter or longer than they expect, and sperm can last a number of days in the pelvic cavity.
The other third lack ovulation or have a short luteal phase less than ten days in which progesterone production is insufficient for normal physiology and fertility.