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更多“妊娠（pregnancy）是__和__在母体内发育成长的过程…”相关的问题
People born in autumn live longer than those born in spring because______.
A．a mother giving birth in spring has less nutrition during her pregnancy
B．a mother giving birth in autumn eats more vitamins during the last stage of her pregnancy
C．a baby born in spring receives no protection from infections
D．a baby born in autumn is never subject to any infections
A.Pregnancy
B.Hijacking
C.Emergency
D.Air rage
In early pregnancy, certain changes occur in the mother's gastrointestinal tract, resulting in more efficient absorption of specific nutrients, such as iron and calcium. Furthermore, the maternal blood supply increases, so that nutrients can be transported via the uterine and placental blood systems: If the mother is undernourished, this "lifeline" to the fetus will be inadequately developed. Finally, fat is accumulated within the body to store the energy necessary for lactation (milk production), This preparation for lactation is so important that if the mother is inadequately nourished, it will take place even at the expense of fetal growth. It is a logical developmental occurrence, since in the natural world, no infant can survive without successful breastfeeding, and thus fetal growth is less of a priority.
According to the passage, which of the following is required for lactation？
A．Fat storage.
B．Iron and calcium.
C．Increased blood supply.
D．A well-nourished placenta.
A.受精卵在子宫体腔以外着床称异位妊娠
B.子宫瘢痕妊娠属于正常宫内妊娠，不属于异位妊娠
C.卵巢妊娠一般在手术前都能确诊
D.输卵管妊娠因转归不同可分为破裂型、流产型和恢复型
女性胎儿卵巢开始分化发育是在妊娠
A．15-16周
B．17-18周
C．9-10周
D．11-12周
E．13-14周
A.部分性和完全性核型一样，但组织学不同
B.部分性和完全性根据组织学检查可做出诊断
C.超声检查越早越容易诊断
D.鉴别诊断需要流式细胞学和免疫组化
E.葡萄胎妊娠都是在宫腔内
在妊娠期不同阶段中，用药不当致胎儿娩出后可继续受到药物作用的是
A.妊娠第l4天到30天
B.妊娠第20天到90天
C.妊娠l4周到6个月
D.妊娠6个月到9个月
E.产前
