Male circumcision is common at birth in the United States. 男嬰出生時行包皮環切術在美國很普遍。
In other new research, a study has found that circumcision does not decrease the risk that H.I.V. positive men will infect women. 在其他最新研究中,一項調查發現,包皮環切手術不能降低艾滋病毒陽性的男子感染女性的風險。