twin

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Related to monochorionic twins: identical twins, dichorionic twins

twin

1. 
a. either of two persons or animals conceived at the same time
b. (as modifier): a twin brother
2. a crystal consisting of two parts each of which has a definite orientation to the other
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

twin

[′twin]
(biology)
One of two individuals born at the same time.
(crystallography)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
This is consistent with the recommendations of the National Institute for Health and Care Excellence (NICE) to deliver dichorionic twins by 37 weeks and monochorionic twins by 36 weeks of gestation.1
The chronic and unbalanced transfusion occurs in about 5% of monochorionic twins, generally after 26 weeks' gestation.
Monochorionic twin pregnancies were excluded from the analysis due to their greater perinatal morbidity rate compared to dichorionic twin pregnancies [11].
The optimal time for delivery of monochorionic twins to reduce the risks from cord entanglement, growth discrepancies and intrauterine fetal death is still controversial.
Iron metabolism in monochorionic twin pregnancies in relation to twin-twin transfusion syndrome.
The timing of delivery of discordant growth monochorionic twin pregnancies is controversial.
In monochorionic twin pregnancies complicated by intrauterine fetal demise (IUFD), fetal MRI can be used to diagnose multicystic encephalomalacia, a devastating neurologic disorder that may occur in up to 20% of moncehorionic twins complicated by single IUFD.
Antenatal surveillance of all monochorionic twins is recommended, given the increased risk of stillbirth; many centers start testing at 32 weeks' gestation.
Incidence 1 in 35000, 1% in monochorionic twins. It is a consequence of TRAP (twin reversed arterial perfusion).
Monochorionic twins had significantly high rates of stillbirths than dichorionic (p = 0.023).