Welcome to HCM
Read your prob, your follicals are matured at 12th july. you got shot of Hcg
on that day, it is ovarian stimulant n helps in rupturing of follicals n start ovulation. ovulation occure after 36 to 40 hrs of shot. so if you had unprotected sex on 12th 14th 16th july then there is more chance of getting pregnant.