First one must have a pregnancy program. Doctors suggest that women have all their children before the age of 34. The second thing is prenatal checkups. Women can have amniocentesis done from the 16th to the 18th week of pregnancy to have the chromosomes of the fetus checked so that Down's can be discovered early on.
首先要做好生育計畫，醫生建議產婦在卅四歲以前把孩子生完；其次是產前檢查，懷孕十六∼十八周時做羊膜穿刺，吸取羊水做胎兒的染色體檢查，可以早期發現。