The Nige-rian dwarf goat was the perfect candidate, as it begins breeding and lactating at just 13 weeks.

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Coverage of pregnant and lactating mothers, for example, is still low.

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"That has been successful, and now it aims to expand its market to expectant mothers, " says Pile of Martek's working with partners to offer a range of nutritional supplements to pregnant and lactating mothers.

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Guidelines suggest that all pregnant and lactating women should take Vitamin D and Professor Nussey said many working in the field believe there has been a resurgence of the disease is related to the fact that recommendation is not followed.

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