Male circumcision is common at birth in the United States. 男婴出生时行包皮环切术在美国很普遍。
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，一项调查发现，包皮环切手术不能降低艾滋病毒阳性的男子感染女性的风险。
