Day 15: Your egg is starting its journey down the tube in hopes of a sperm rendezvous. If you don't want that to happen but had a condom mishap, it's not too late to take emergency contraception.
If you are trying to get pregnant, intercourse on the day after ovulation (just in case) is good practice. If things start to get funky down there (a common occurrence with frequent intercourse), reach for pH-balancing gel to keep your vaginal pH in check. Now your estrogen and testosterone levels are starting to drop, while progesterone levels are rising rapidly.
Day 16: The egg, ever hopeful, is still hanging out in the tube waiting for Prince Sperm.
Day 17: The lining of the uterus is getting thick. If the egg has successfully united with sperm, it will soon make its home there. If conception hasn't taken place within 24 hours of ovulation, the egg will die. Estrogen levels are on the way down, while progesterone levels are sky-high.
Day 18: Now estrogen will start to make its comeback. Progesterone levels are still up there.
Day 19: If you're trying to get pregnant, or concerned that you might accidentally be pregnant, don't head to the drugstore yet. It's still too soon to take a pregnancy test.
Day 20: The end of your cycle is nearing, and it's around this time that PMS symptoms will start to rear their ugly head. You may feel slightly bloated and moody.
Day 21: If you're trying to get pregnant and want to confirm that you've ovulated, this is the perfect time for your doctor to check to see if your progesterone is elevated.
Day 22: Time to check your tampon stash so you won't have to make a midnight trip in a few days.
Day 23: PMS is in full swing. Treat yourself to a bubble bath or a nice bar of chocolate.
Day 24: About a week after ovulation, your progesterone levels will be at a high. Estrogen will start to drift down.
Day 25: This will probably be your worst PMS day. Expect major bloat. And don't be surprised if running out of ketchup brings on unexpected weeping.
Day 26: Don't, I repeat, don't get on the scale. It's not you; it's that premenstrual fluid retention.
Day 27: Get excited: PMS symptoms are winding down.
Day 28: This is about the time that your cycle comes to an end. If you're not pregnant, your period is on its way. The uterine lining is at its thickest to get ready to shed. Tomorrow, the cycle starts again.