Original poster's comments 2. See all replies 1. I always did 36 hrs roughly. Thanks for your comment! I'm hoping IUI will work for us as well :. I have had three IUI's. Two of three worked, though both ended in mc. The clinic says 36 hours, but they don't really schedule the IUI, you get a pager and it is first come, first served So it is normally more like 38 or so.
But I have taken the trigger 5 times total. Had to cancel those IUi due to other reasons , and every time I feel myself ovulate closer to 42 hours. Using Follistim, your cycle should not be timed based on a calendar, but on the growth and size of your folllicles.
In addition, at your age, the maximum number of ovulatory follicles should be no more than 3 because of the significant increased risk of a super-multiple if there is more than 3. So, the proper way to do this is daily ultrasound, if necessary, as your follicles reach closer to the 18 mm point. The times don't have to be exact. The sperm just needs to be there reasonably close to ovulation and precede ovulation. Since it cannot be known exactly when ovulation occurs and it is know that it can take up to 12 hours for the egg to find and enter the tube, exact timing cannot be done.
In general, follicles grow at 2mms per day but this can vary as well. That is why close ultrasound surveillance needs to be done as you get closer. If your doctor solely uses a calendar date, such as cycle day 16, there is a possibility of missing ovulation, which essentially dooms this cycle. In any case, based on a 27 day cycle and counting backwards , you would ovulate at around cycle day 13 not It is an easy thing to do and there is no downside risks.
I hate to take that chance when I can cover the risk by adding a little progesterone. I have written extensively regarding timing and doing IUI's in my blog. I would recommend you review that material and discuss your concerns with your physician. Once we estimate that the follicle is ready usually when it measures mm in average diameter , an injection of HCG is administered. How does this compare to using an at-home ovulation predictor kit OPK? Well, in most patients the LH surge will be detectable in the urine after the surge is noted in a blood test.
Usually the egg is released the day following a positive OPK. Patients will typically begin testing on cycle day 12 and test every day until the test is positive. Current research indicates no significant difference in either clinical pregnancy rates or live birth rates when comparing home monitoring of ovulation with OPKs to ultrasound monitoring and HCG triggering. Therefore, the choice is patient specific.
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