Sex and pregnancy

Been with my partner for 5 years now. He is now my fiancé and we have talked about starting a family. We have always had a very healthy sex life. No issues in that department. We recently bought a house and found out we are expecting. With the move being so stressful and living in a new house we hardly have a sex life now. He says it’s different now and doesn’t want to hurt the baby. I told him that’s not possible. Has your sex life changed now with pregnancy and if so what changed?