Sex during pregnancy: What's OK, what's not - Mayo Clinic
How to Enjoy Sex During Pregnancy
Sex-wise, my wife and I have never found pregnancy a problem, and this pregnancy has been no exception. I am not sure if it's unusual, but I found all the fecundity - the swollen belly, the enormous boobs - rather arousing. Pregnancy certainly lends itself to a certain gingerness when it comes to the more kinetic elements of intercourse. In fact, the idea that sex should continue unabated during pregnancy is actually a relatively new notion.
Everything you need to know about pregnancy sex (but were too shy to ask!)
Pregnant sex is not that much different from regular sex when you talk about the basics. But on the mechanics of sex and pregnancy , there are some differences, however. Paying attention to these differences means the difference between a positive experience for you and your partner and a potentially negative one.
Pregnancy fetishism also known as maiesiophilia or maieusophoria  is a context where pregnancy is seen by individuals or cultures as an erotic phenomenon. There are no particular or preferred elements within maiesiophilia that are common to all maiesiophiliacs. Some may pursue fantasies that are concerned with the circumstances in which a subject may give birth, or to the conditions to which the pregnant subject may find themselves acting upon, such as approaches to mobility, sleeping, and dressing.