Hi Aqua,

Welcome!
Am not sure what you mean by 'when do they put them in?'
Are you still continuing with IVF -ICSI? If so - will all be the same. If you are going the IUI route - I gather you are quite young if doing this, then they 'put it in' right at ovulation. The clinic will give you a testing kit and also do some bloodtests to determine the actual day to inseminate you.
Hope that answers your question..