Two cases of monochorionic diamniotic twin gestation with severe oligohydramnios-polyhydramnios sequence ('stuck' twin) are described. In each of these cases there was a marked fluctuation in amniotic fluid volume and reversal of which twin was 'stuck'. The definitive identification of the twins was evident due to a discordant fetal malformations in each twin pair.
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Bromley et al. (1996) studied this question.
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