IUD vs. Birth Control Pills

My fiancé and I have always used condoms, but I am thinking about either going on the pill or using an IUD. My gynecologist is suggesting an IUD ( but said it’s up to me) but we’re getting married next December and going to try to start having children by the summer of 2019. I’m just wondering if it will be worth it to get an IUD only to have it taken out in the next 18 months or if I should go on the pill. I’m curious to hear others experiences and if anyone else has been in the same boat.