Well, it's the time of the month when we have menstrual cycle posters up for sale in the I Heart Guts shop. Special thanks to Dr. Catherine Leclair, Dr. Juliana Hansen, Dr. Jody Steinauer, and Paavi Davidson, who all helped straighten me out on a few key facts, and thanks also to everyone who wrote in with comments and corrections. You'll see the above final version includes a blastocyst, missing before, plus some clarification on the corpus luteum. The hormones are also drinking during the hormone party, which we though apropos for that pre-ovulatory time of the month. We hope this poster helps ya get through those progesterone drops and wacky hormonal hell, or at least livens up your walls. Ova and out.