I stopped drinking coffee just the day before transfer. I love coffee so much and it gets very difficult sometimes. I miss my freshly ground brewed coffee. I have read controversial articles about coffee and pregnancy. So I am keeping myself away from any kind of coffee. I just drink water, milk and juice...:(
my RE (and now my midwive) said 1 cup of regular coffee a day was fine. since i had cut back from about 10 cups to the one in 2 months prior to starting my IVF, i felt ok with just my one.
now i have coffee once or twice a week, but i don't drink any soda or consume any artificial sweetners.
I've read that if it's organic decaf, it's ok. I get it at Trader Joe's: Organic Decaf French Roast whole bean. But I wouldn't have too much (maybe just a cup) b/c there is a very small amount of caffeine in it.