Reuters

The study results, which found the influence of both parents to be roughly equal and multiplicative, strongly suggest a genetic reason for the tendency of "small-for-gestational-age" babies to run in families.
It also raises the question of whether such a tendency should be considered a medical problem or a normal variation in growth, Dr. Delphine Jacquet of Hopital Robert Debre in Paris and colleagues write in the women's health journal BJOG.

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