[There's] nothing like a spinning head and the need to hover over a toilet bowl to get you in the mood, right ... ? (WRONG.) It is no surprise that during this period of pregnancy, many women feel disinterested in physical intimacy.
That said, it is perfectly normal and healthy if you ARE aroused -- sex will not hurt your baby. Many women are nervous that intercourse is dangerous for a fetus, but this is a myth. Except in highly unusual and extenuating circumstances, sexual activity will have no negative impact on the cells developing in your uterus. One main exception to this rule -- you should avoid intimacy with anyone who may have a sexually transmitted infection, as it can be passed to the fetus in vitro.
Upon entering the second trimester, many women feel that they are starting to get the hang of this pregnancy gig.