The act of intimacy releases oxytocin, that crucial hormone needed for contractions to start. Semen may also soften the cervix, and having an orgasm can get things going, too. So my husband and I got busy nightly, and while I enjoyed connecting with him, my huge tummy made finding a comfortable position comically difficult.
The verdict: Good times, but our baby stubbornly hung in there no matter how much lovemaking we logged.