Shannon, to answer your question, on a stim cycle our FS prescribes crinone, and on FET cycles she prescribes pessaries. Why they do the gel for stims and pessaries for the FET I have no idea.

Even if DW wanted to do a fully natural cycle, they still insist on pessaries. So to me that's not "natural", as none of the women I know who have fallen pg naturally have inserted a pessary into their vagina twice a day for 12 weeks. But I digress

It seems to be that whilst it may be pointless, it won't do any harm. Still seems dumb though in the cases of MF infertility.