Fertility

My husband & I can’t conceive naturally, primarily due to my husband, but we can conceive through IUI or IVF. We both are ready and consent on approaching these options. My in-laws (his parents) are causing issues. They believe we need their consent and they need to included in such a private matter, I am not comfortable with my in-laws involvement in this because it’s a very private matter and intimate matter of our lives. Also because I’m not comfortable sharing details about menstrual cycle and other things that come with my reproductive anatomy.
They think I need their permission, and they should be involved in this. They also scolded me for going to my appointment without them, even though my husband gave me permission to go.

Is it in Islam that they should be involved? Isn’t my consent important to who I am comfortable with going to my ultrasounds etc? Can they decide things for me? Do I need their permission?