What is a good mature follicle size for IUI? - Dr. Ashwini S G

Ovulation induction drug in IUI procedure is usually started at around the 2nd day of the periods. So after that serial ultrasound are conducted to know the growth of the follicles. So once the follicles has reached a mature size, that is around 18 to 20 mm, we give a maturing or rupturing injection. So the major follicle is somewhere between 18 to 20 mm and on colour doppler we see a good flow in the follicle. So such a follicle is taken as a major follicle.