Low T partner in mid 20’s

This is a sensitive topic and I literally don’t know how to approach it with anyone, so please be kind here.

My partner and I have been together for about 3 years. We’re currently expecting our first child and ever since I got pregnant, our sex life has rapidly declined.

We used to fight about it. I’ve never had to be the aggressor and all of the sudden, it’s either me making the move or it’s not happening at all, and 9 out of 10 of my attempts are refused. It’s so discouraging. And I’ve stopped fighting about it because he says the pressure just makes things worse. But I miss the intimacy, and not just sex, but the closeness and the connection it brings. He swears it has nothing to do with the pregnancy. I don’t know if I fully believe it.

He’s come to me before and said he thinks he may have a low t problem, but he hasn’t seen a doctor yet. He’s only 26. He is tired a lot, deals with some depression, and living with him full time, I know he’s not watching a ton of porn as an alternative.

I’m just frustrated and sad. I’m tired of trying to be sexy, trying to give favors with no expectations of a return just to find a spark, and being shot down.

I just want to know if low t is really a decent possibility here and if you’ve dealt with this in your relationship, how? We have an otherwise loving and healthy relationship. I just don’t know how to reignite what we used to have.

In my past experiences, when the sex goes away in relationships, there’s usually another reason and other things can crumble.

I just want my partner back; the one who used to think I was irresistible and was all over me any chance he had.

Any help is appreciated.