More twins are being born now than ever before, largely due to rising use of in vitro fertilisation (IVF) and other assisted reproduction techniques, the first global study of human twinning has found.
They found a 71% rise in twinning rates in North America, as well as significant rises in many European countries and in Asia. For Asia overall, there was a 32% increase.
While factors such as women choosing to start families later, greater use of contraception, and lower fertility rates might be playing some part in the increase in twinning rates are the main drivers.
Such fertility treatments were originally available in wealthier regions, but spread to emerging economies in Asia and Latin America in the 1980s and 1990s, reaching the relatively richer parts of South Asia and Africa after 2000.
Passengers refusing to wear a mask properly or follow social distancing norms during a flight despite repeated warnings could be put on a no-fly list for a period of three months to two years or more.
The DGCA has also said that if a passenger refuses to comply with the instructions before a flight takes off, then he or she should be deboarded.
The civil aviation requirements on unruly passengers provides for an offender to be put on a no-fly list for varying periods — three months for verbal abuse, six months for physical assault and two years or more for life threatening behaviour.