The best time for you to deliver your baby is 39 weeks or later. Many physiological changes occur in the last 3-4 weeks of your pregnancy to help your baby prepare for extrauterine life. If you have a short cervix, premature labor, or risk for preterm delivery, you should AVOID intercourse. Having sex can stimulate labor and potentially a preterm birth. Babies born early can have many problems with feeding, breathing, temperature, infection, and glucose control and other problems. Your baby may have to be admitted to NICU. Unless its medically indicated for you to deliver early, wait it out, let your body and baby do the work. For more information check out March of Dimes article “Why at least 39 weeks is BEST for your baby”.