论文部分内容阅读
B超检查既无任何损伤,又无任何痛苦,且胎儿的外形及内脏发育情况可通过B超清楚地显示出来,所以易被孕妇接受。尽管如此,并不是说孕妇做B超的次数越多越能更好地监测胎儿发育,对优生越有益,超声波可对胎儿产生一定的干扰,使之在母体内躁动不安。一般对于无异常表现的孕妇来说,整个孕期做两次B超检查较为合适。怀孕三四个月时胚胎已初具人形,各器官原基均已形成,此时做B超检查可以掌握胚胎发育情况,若胚胎发育正常,还要在怀孕八九个月或产前再做B超检查。以了解胎心搏动情况、胎头及胎儿大小、胎位如何、胎盘状态等。但并不是说孕期B超检查的次数绝对不变,要具体情况具体对待,若有先兆流产、妊娠中毒症或高危妊娠,应增加B超检查次数,以便及时掌握胎儿情况。最好能在孕后三、六、九个月时分别做B超检查一次。另外,在怀孕早期服用过可能影响胎儿发宵的药物,孕早期被病毒感染过或做过X线检查、有家族遗传病的妇女,也应增加B超检查次数,目的是保证胎儿出生质量。
B-ultrasound without any damage, without any pain, and fetal shape and visceral development can be clearly demonstrated by B-, so easily accepted by pregnant women. However, not to say that the more the number of pregnant women do B ultrasound to better monitor fetal development, the more beneficial to the eugenics, ultrasound can have a certain disturbance to the fetus, making it restless in the mother. For pregnant women with no abnormalities, it is more appropriate to do B-ultrasound twice during the whole pregnancy. Pregnant three to four months when the embryo has begun to take shape, all the original organs have been formed, this time to do B ultrasound examination of embryonic development, if normal embryo development, but also in pregnancy eighty-nine months or prenatal do B-ultrasound. To understand the situation of fetal heart rate, fetal head and fetal size, fetal position, placental status. But not to say that the number of B-ultrasound during pregnancy is absolutely the same, to be specific to the specific situation, if threatened abortion, gestosis or high-risk pregnancy, should increase the number of B-ultrasound in order to grasp the fetus situation. Best in pregnancy after three, six, nine months were done when B-ultrasound. In addition, taken in the early stages of pregnancy may affect the fetus drugs, early in pregnancy infected with the virus or had X-ray examination, family history of genetic diseases should also increase the number of B-ultrasound, the purpose is to ensure the quality of fetal birth.