I took EPO vaginally one time, and had a 1 hr 15 minute freight train style delivery. Before you tell me this is your dream birth, let me tell you it was beyond f-ing excruciating to dilate 10 cm in 60 minutes. I was less than 50% effaced, and dilated a fingertip 3 days before birth. I have had an 18 hr labor, 2 hr transition, 1 hr 15 minute pushing birth, and a 3 1/2 hr home waterbirth. These were the most painful contractions I have ever felt, I was cursing at the peak of them and just could not grasp why I was having so much trouble staying on top of them and dealing with them. I hadnt used my Bradley birth method stuff during my second birth, didnt need it, but I was really working the low, moaning vocalization thing with this labor.
I woke with a horrible burning and pinching sensation in my cervix, and it lasted for about 20 minutes. My contractions started at that point, 30 seconds long, 2 minutes apart. My midwife's text said that in some women, taking it vaginally can cause a "loose cervix", which apparently is what happened to me.
I know women who take it orally and vaginally and nothing happens.
But I would never encourage anyone to take it vaginally after my personal exeperience.
I recommend overexerting yourself in the garden, or doing a difficult exercise tape. I did a 6 day "bootcamp" with my favorite workout every night to try and get baby to come out. Worked after one night with my second baby, so I was a little irritated that I had to do it 6 nights in a row for it to help at all. LOL!