After you take your no-baby-please pills for the set amount of time, you get to go in for blood work and a vaginal ultrasound. We call this little lovely machine, Wanda. Here's a picture (yea, yea, we all know what it looks like). And she only costs about $20,000-$40,000!
The blood work checks your progesterone and estrogen (fancy little hormones necessary to making eggs and getting pregnant). They will also do a blood pregnancy test to make sure you're not pregnant before starting everything, while the vaginal ultrasound peeks around at your ovaries.