Final answer:
The newest emergency contraceptive pill, ella, can be taken within five days after unprotected sex and works by preventing ovulation or fertilization of the egg.
Step-by-step explanation:
The newest emergency contraceptive pill (ECP), ella, can prevent pregnancy if taken within five days after unprotected sex. The morning-after pill is a type of emergency contraceptive that is most effective the sooner it is taken. It can be composed of a single-pill dose or a two-pill dose, which work by inhibiting or delaying ovulation or by preventing the fertilization of an egg by sperm.
It is important to note that emergency contraceptives are a backup method to prevent pregnancy and should not replace regular forms of contraception. In the case of the ella pill, it offers a wider window compared to other emergency contraceptive pills that must be taken within 72 hours. For women seeking emergency contraception, ella provides a critical option to help prevent pregnancy after having unprotected vaginal intercourse or in cases where regular contraception has failed or was used improperly.