I have been trying to conceive for 1.5 years. i had a healthy pregnancy 2 yrs ago without medical assistance. i have gone through 3 iui and hormones?

Sounds good: It sounds like your doing all the right things. Sometimes it just doesn't work the way it did the first time. You also 2 years older now and may need more aggressive treatment. 90% of the time if your treatment is going to work it will work in the first 3 tries. It is now time to move onto a more aggressive IUI protocol, IVF or do more testing to find out what is wrong. Best of luck to you!!!