What is TUV ultrasound ? Why my doctor suggest me to go in TUV ultrasound ?

Could you mean a TVU? Transvaginal ultrasound? TUV ultrasounds typically bone density.

Your doctor wants to look at your uterus, ovaries, etc. to see if there is any obvious sign of a problem that may be preventing you from becoming pregnant. How long have you been trying? Have you and your partner had any other testing done?