At any age, pregnancy and childbirth have a big impact on your sex life, but it’s different for everyone. Your body and hormones change throughout pregnancy. That may mean a boost in libido at times, especially during the second trimester, and a lack of desire at others.You also may be anxious about whether it’s safe to have sex while you’re pregnant. (It usually is, but ask your doctor if you’re unsure.) Breastfeeding, raising kids, and other work can also affect the time, energy, and interest you have in sex.