Many benefits, but the main one when TTC is it encourages production of EWCM.
To a lesser extent than Vit B6 and Agnus Castus it can also help regulate hormones. great for helping with pre-menstrual pains and tensions.
I personally stop taking it after Ov and replace it wth Fish oil based Omega 3's (both Essential fatty Acids) as, (although it seems to be contentious and unproven), some studies suggest taking EPO after Ov may increase risk of miscarriage.