I was prescribed citalopram about 8 years ago for some reactive depression. It did really help me, I was on it for about 6 months in all and it helped me get over a really rough patch in my life. I have no experience of combining it with IVF but I can say it's an effective drug. The main side effect I had was a loss of sexual desire while I was taking it and for some time after but as I was single that wasn't really relevant.
Good luck xx