trimester

trimester of pregnancy, first

妊娠头

trimester of pregnancy, second

妊娠中

trimester of pregnancy, third

妊娠末

the first trimester of pregnancy.

妊娠头

The skull is opened in this third trimester stillborn fetus to reveal hydranencephaly.

此处打开颅骨来自一7-9死产胎儿，以显示积水性无脑畸形。