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. 1980 Dec;70(12):1297-9.
doi: 10.2105/ajph.70.12.1297.

Seasonal variation in spontaneous abortions

C W Warren, J Gold, C W Tyler Jr, J C Smith, A L Paris

Seasonal variation in spontaneous abortions

C W Warren et al. Am J Public Health. 1980 Dec.

Abstract

Using a national sample of hospital discharges, we found identical seasonal patterns for spontaneous abortions and conceptions but no significant seasonal variation in the rate of spontaneous abortions per 1,000 conceptions. The differences between our findings and those of previous investigators of spontaneous abortion may reflect our more comprehensive definition of spontaneous abortion, our more complete estimate of the monthly number of conceptions, and our more rigorous statistical analysis. The periodic regression analysis (PRA) reported in our study may be useful in other studies that monitor short-term trends.

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References

    1. Br J Prev Soc Med. 1971 Nov;25(4):222-4 - PubMed

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