Yes, adoption is certainly an option but I would need to get my DH to agree too, I guess
I’m not sure what you mean. You don’t have to get his legal agreement, it’s the social workers or court who would do this.
He chose to get you pregnant. He says he doesn’t want more children yet he didn’t get a vasectomy and he chose to have PIV sex knowing that pregnancy was a possible outcome.
He has to live with the consequence of that choice, same as you do. Once the baby is growing in your body, he has fewer choices , legally and morally.
He knew all this beforehand.
So Your husband doesn’t need to agree to you continuing the pregnancy. He can’t force you to do anything you don’t want to.
He can’t stop you making an adoption plan, if that’s what you want. Of course once bay is born he can choose to raise the baby himself or place baby with another relative to raise ( assuming that you consent to this ).
Of course the social workers will want to speak to your husband and you before the birth . But neither or you can legally consent to the adoption until the baby is at least 6 weeks old, although baby can be placed with foster carers or prospective adopters straight from the hospital.
Your husband can’t block the adoption. If the child is in care and you have consented to adoption, he can’t just say “ well I don’t want to raise this child but I won’t let her / him be adopted, I want him/ her to remain in foster care for the rest of their life “.
If he tried to do that, there would be a court hearing and the judge would remove his rights. This is because it’s about the best interest of the child and not the parent’s wishes.
If you think this is an option for you then I encourage you to get some counselling now. There are no easy choices here and I hope you can get some RL support to help you work out what’s right for you.
Whatever happens, there will be arguments and both of you will be angry, sad and guilty.