Diet shakes and TTC??

Hi, im needing some advice. I have been researching and researching, trying to find out if having diet shakes can prevent falling pregnant... Every answer i find just goes round in circles and confuses me. Now i know that its not an ideal thing to do while TTC, but im just trying to take my mind off of the whole baby thing and focus on my weight, health and feeling good :)(hoping maybe it might just happen, while im not thinking about TTC).. Keeping in mind i'll still be having one propper meal each day, with healthy snacking between shakes. I dont know, what do you think?