WOMAN ON TOP
Since this position completely keeps the belly out of the way, pregnant women often favour this position.
SCISSORS
This position allows for gentler and slower penetration, which would make it easier to work around the belly.
ORAL SEX
Not exactly a “position” per se, but it pays to know that performing oral sex or having oral sex performed on you is certainly not out of the question! Remember though, if oral sex is performed on the pregnant woman while blowing air into the vagina, the woman can develop an air embolus, which can travel to the lung and have potentially fatal consequences.
SOURCE: WebMd.com