el-Shafei A, Rao P S, Sandhu A K
Aust N Z J Obstet Gynaecol. 1986 Aug;26(3):168-72. doi: 10.1111/j.1479-828x.1986.tb01559.x.
In this study in Bahrain increased maternal age, high parity, consanguinity and a history of 2 or more previous abortions were found to increase the risk of congenital malformation.
在巴林的这项研究中,发现母亲年龄增加、多产、近亲结婚以及有两次或更多次既往流产史会增加先天性畸形的风险。