Trigger shot timing?

Waiting4baby08

I feel like I must be missing something very obvious.  Why do some people have their IUIs 24 or 36 hours after trigger and some 12?  My RE is having me trigger tonight and our IUI is in the morning...I am confused.

Dr.Loretta

Ask your dr.

It may have to do with how mature your follicle looks, as well as their experience with the trigger and the IUI timing.

Good luck tomorrow.

bwm2bmw

12 hrs does seem a little early, unless you're having b2b iui's? The following is from FertilityPlus.org:

Q: When is the best timing for an IUI?

A: Ideally an IUI should be performed within 6 hours either side of ovulation ? for male factor infertility some doctors believe after ovulation is better, otherwise chances of success are higher with insemination before ovulation with the sperm waiting for the egg. When timing is based on an hCG injection, the IUIs are usually done between 24 and 48 hours later. Typical timing would be to have a single IUI at about 36 hours post-hCG, though some do it at 24 hours, and some clinics are reporting better results when doing the IUI at 40-42 hours post-hCG. If two IUIs are scheduled, they are usually spaced at least 12 hours apart between 24 and 48 hours after the hCG. Some reports show no increase in success rates with two IUIs, but others suggest it may increase success as much as 6 percent.

Some doctors will base timing of IUI on a natural LH surge. In that case, a single IUI at 36 hours is the norm, but doing them at 24 hours is also pretty common since ovulation may be a bit earlier. When two inseminations are planned, they are usually timed between 12 and 48 hours after the surge is detected.

The egg is only viable for a maximum of 24 hours after it is released.