As far as I'm aware, it uses the same pressure points as acupuncture, but without needles. (I haven't seen a practitioner who specifically focuses on reflexology but my massage therapist uses it as a technique).

There is a pressure point just around the ankle bone which can induce uterine contractions (which is why someone doing preggi massages will avoid heavy pressure around that area), as well as a pressure point on the little toe which is supposed to be good for turning babies. It's referenced on the spinning babies website if you want to know more about it!

Years ago, when I had an ectopic (I nearly collapsed at work and had to have an ambulance called), one of my colleagues who had studied reflexology was with me waiting for the ambulance, and was able to tell that it was either uterine or ovarian just by massaging my feet. I was astounded when I found out what it actually was (I hadn't known I was pregnant).