Husbands lack of sex drive

We literally only have sex between 3-5 times a month. I am trying to focus these around ovulation day, but this has become so stressful for me. I have endometriosis which doesn’t help with my stress level concerning pregnancy, plus I have had 2 miscarriages in the past befitting a hard and dangerous pregnancy with my son (almost 10 years ago now). We just started trying in July 2019. I literally do not know what to do to increase his sex drive. We have talked about several times. I have tried foreplay, catering to him and his needs and .... nothing. He literally likes to cuddle and that is it! Ughhh help please.