双头畸胎在爬行动物中很常见，尤其是英国草蛇，这种蛇把卵产在堆肥堆里，肥料里面正在腐烂的物质产生热量。
Dicephalus is common in reptiles and particularly in British grass snakes, who lay their eggs inside compost heaps where decomposing matter produces heat.
同卵双生双胞胎和双卵双生双胞胎分享仅50%的基因。
Siblings and dizygotic twins share only 50% of their segregating genes.
我们描述一个案件双卵双胎妊娠其中提到了我们的中心，因为一个不和谐的异常之一的双胞胎。
We describe a case of dizygotic twin pregnancy which was referred to our centre because of a discordant anomaly of one of the twins.
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