The month of birth does not affect the risk of hypospadias

Skriver MV, Pedersen L, Stang P, Lund L, Rothman KJ, Sorensen HT. The month of birth does not affect the risk of hypospadias. Eur J Epidemiol. 2004 Dec 1;19(12):1135-6.

We studied the pattern of annual cyclical variation of hypospadia by month of birth for all boys born in Denmark after 1983 and hospitalized with hypospadias. We found little indication of any seasonal pattern, with a peak to low ratio of 1.06 (95% CI: 1.00-1.17).

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Skriver MV, Pedersen L, Stang P, Lund L, Rothman KJ, Sorensen HT. The month of birth does not affect the risk of hypospadias. Eur J Epidemiol. 2004 Dec 1;19(12):1135-6.