The second trimester is the “sexiest” one due to surges of pregnancy hormones, known as estrogen and progesterone. Between weeks 14 and 26, women tend to have more energy, feel less nauseous and still have a small belly. Many women report having a high sexual desire (in other words, they are super turned on) and intense orgasms. Fellas, sex during pregnancy is perfectly safe, let me repeat, sex during pregnancy is totally SAFE. Not to mention, women are usually extremely horny once the morning sickness has stopped. If you’re still feeling cautious and want some tips, or just want ideas to make sure your wife is comfortable during sex, check out 5 great pregnancy sex positions in our blog and podcast Episode 19: Sex during Pregnancy. Beyond having an increased libido, her blood volume also increases to account for the probable 500ml to 1000ml (2-4 cups) of blood she loses during delivery. While most women have a stronger desire for sex during the second trimester, I’m sorry to inform you that as she approaches 3rdtrimester, she begins producing prolactin, the hormone that starts milk secretion, which can decrease a mom’s libido.