While the aspect of making love may be frowned upon during pregnancy, there is enough evidence to indicate the efficacy of intercourse in expediting child birth. In ones quest to know how to induce labor yourself, having intercourse during the latter stages of pregnancy works in a lot of positive ways. First of all, it is the most effective tension reliever and therefore helps an already stressed out couple to relax during such times. Furthermore, the hormones released during intercourse and especially when a woman experiences orgasms play a significant role in helping the newborn make its way through the uterus more easily.
Sperm in itself is a great ripening agent and its elements are known to ripen the cervical cavity. In fact, other forms of intimacy such as those involving the stimulation of nipples during intercourse also tend to produce oxytocin in the body which are needed for creating contractions naturally.