The incidence of cryptorchidism in newborn infants is stated to be 3% to 4% by Curran and Curran in a recent article.1 The reference cited is a report by Scorer published in 1957.2 However, a review of the literature shows that the incidence of cryptorchidism in the full-term new born infant is slightly lower and in the low birth weight infant (birth weight 2,500 gm or less), it is considerably higher.

Up until 1955 there was much confusion regarding the incidence of undescended testes in the newborn.

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