Twin birth in the context of "Look-alike"

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⭐ Core Definition: Twin birth

Twins are two offspring produced by the same pregnancy. Twins can be either monozygotic ('identical'), meaning that they develop from one zygote, which splits and forms two embryos, or dizygotic ('non-identical' or 'fraternal'), meaning that each twin develops from a separate egg and each egg is fertilized by its own sperm cell. Since identical twins develop from one zygote, they will share the same sex, while fraternal twins may or may not. In very rare cases, fraternal or (semi-) identical twins can have the same mother and different fathers (heteropaternal superfecundation).

In contrast, a fetus that develops alone in the womb (the much more common case in humans) is a singleton; one of a multiple birth is a multiple. Unrelated look-alikes whose resemblance parallels that of twins are referred to as doppelgänger.

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Twin birth in the context of Midwives

A midwife (pl.: midwives) is a health professional who cares for mothers and newborns around childbirth, a specialisation known as midwifery.

The education and training for a midwife concentrates extensively on the care of women throughout their lifespan; concentrating on being experts in what is normal and identifying conditions that need further evaluation. In most countries, midwives are recognised as skilled healthcare providers. Midwives are trained to recognise variations from the normal progress of labour and understand how to deal with deviations from normal. They may intervene in high risk situations such as breech births, twin births, using non-invasive techniques. For complications related to pregnancy and birth that are beyond the midwife's scope of practice, including surgical and instrumental deliveries, they refer their patients to physicians or surgeons. In many parts of the world, these professions work in tandem to provide care to childbearing women. In others, only the midwife is available to provide care, and in yet other countries, many women elect to use obstetricians primarily over midwives.

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