Review of twin pregnancies in a tertiary hospital in Abuja, Nigeria.

J Health Popul Nutr · 2013 · PMC3702349 · PMID 23930346

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an increasing trendno p-value reported

It can be inferred that there was an increasing trend in the last three years of the study, although the rate of twin deliveries generally was fluctuating.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.