Trying for 2nd baby

Wondering how many people out there had problems conceiving baby #1, then had better/faster luck with baby #2? My husband and I had to do an iui with DS and are currently trying for baby #2 naturally. We are going to try the iui again in December if we don't have any luck. Just curious is anyone had this same situation.

I'm 36, DH is 37. Both of our birthdays are this August, so we are closer 37 and 38.

Thanks so much!