While abstinence from sexual intercourse is theoretically fully defensive from pregnancy and sexually transmitted infections, in actual practice, abstinence often is not maintained which leaves teens vulnerable to being pregnant and STIs. Recent data indicate the median age initially intercourse for females is 17.4 years, while the median age initially marriage is 25.3 years. Related StoriesStudy: Visceral unwanted fat in early pregnancy can increase threat of gestational diabetesAddressing quality of life needs in prostate malignancy: an interview with Professor Louis DenisDeaths from avoidable risk elements: an interview with Dr Ali Mokdad, IHMEThe survey recommends that efforts to market abstinence should be predicated on sound research.The researchers named these sentinels ‘dependence receptors’. The research team focused on this idea of ‘dependence receptors’. When a cell receptor is certainly associated with its ligand, the classic message indicates ‘all is well’, and qualified prospects to cell survival. On the other hand, when the receptor is normally deprived of its ligand, it could send a message leading to cell death. This mechanism is also called ‘apoptosis.’ When this is applied to cancer research, the lack of ligands might lead to the death of cancer cells that proliferate within an anarchic way.