the more you know...Progesterone

progesterone rises after ovulation. If you are not pregnant, it will stop dropping and then you will get AF, if you are pregnant, it will stay up for about 10 weeks to sustain a pregnancy until the placenta takes over. Progesterone will cause a lot of "pregnancy like" symtoms, such as sore breasts, moodiness, increase in appetite, constipation, bloating, headaches, and even nausea, it pretty much mimics the "common" pregnancy symptoms.