Does your family support your decision of TTC? Yeah, everybody wants more babies in the family
Do they know you are TTC? My family knows because they are constantly harassing me about whether I'm pregnant yet

I'm not sure about DH's family. We aren't keeping it a secret, but they never ask us about it, and DH doesn't like bringing it up.
Were they supportive when you had your loss(es)? They tried, but none of them were particularly helpful. My mom was so upset for a couple days that she couldn't talk to me without sobbing and ending the conversation, and then she just never talked about it again. DH's mom kept asking if we were sure the doctor didn't know what caused it, which wasn't necessarily helpful at the time- but she is the only person who has ever remembered our lost little one on our EDD or holidays.