I'm on my second clomid cycle w/ trigger shot. Basically what happens is I go in on CD 10, 12, and 14 for bloodwork and a sono. In the bloodwork they measure several things like progesterone and estradiol. They want the estradiol to be between 300 and 400. Right after getting blood drawn, I go in for a sono.
On the first day they usually get an idea of the sizes of the follicles and they see one that is a little larger than the rest, although they are all around the same size on me (The biggest being about 1.4cm this cycle). One follicle each month will likely shoot off and start growing while the rest just kind of go back to sleep. Sometimes you may see a couple more get bigger too, which is where the risk of multiples comes from). The second day you can usually see a nice increase and may be triggered. If the follies or blood test aren't about right on the second day, they have me come in on the 3rd day for more blood work and sono.
The short answer to your question is:
Estradiol has to be right around 300 to 400.
Follicles have to be about 1.8 - 2.2 cm.
Although if they see one number being very good but the other one not so good, they'll trigger you anyway.
My numbers this week have been:
Monday: Estradiol = 106, Largest Follicle = 1.4cm
Wednesday: Estradiol = 270, Largest Follicle = 1.8cm
They decided not to trigger me on Wednesday in the hopes that tomorrow we see them even higher.
Sorry for the super long reply and GOOD LUCK!!
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Tom (27) and Patty (26)
HSG - Nov '07: Partially blocked left. Completely blocked right.
Round 1:Clomid (50mg) + Trigger - November 2007 (Without trying because of blocked tube, just to see how I responded to Clomid)
Laser Laparoscopy - Jan '08: Cleaned both tubes and some endometriosis.
Round 2: Clomid (100mg) + Trigger (04/04/08) - 22mm follicle! 2nd Trigger on 04/14. Used Instead Cups when BD. BFP!!!
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