Progesterone (P4) blood level: The P4 check measures the amount of progesterone inside your blood to determine if ovulation has occurred. Ovulation typically comes about in the middle of your menstrual cycle, about two months prior to your next interval. Ovulation disorders are situations that disrupt the conventional ovulation course https://social-lyft.com/story9192702/what-does-ovulation-disorders-examples-mean