I went for a utlrasound to c how big my fol were I had 3 of them 20,23,24 dr said they were great size... That was done on my 12th day of my cycle.. He did give me my trigger shot and told me that I would ovulate 36 hours from the time i had the shot... So he told me to have sex friday nite 12/1am and then again saturday morning...My question is how does he know i will not ovulate earlier.. And the other question is will all 3 eggs be released... I wanted to have sex as soon as i got the shot but my husband is out of town will b home just in time friday nite...