Objective To explore the expression and significance of ER and PR in fibroids and myometrium during pregnancy. Methods 1 We collected 9 pregnant womens fibroids( group A) and myometrium( group B),and 12 nonpregnant womens fibroids( group C) and myometrium( group D). The expressions of ER and PR in these tissues were detected with immunohistochemistry. 2 We selected 110 pregnant women with fibroids as the research objects,and recorded the sizes of fibroids through ultrasonic reports in early pregnancy( les...