一旦发现自己怀孕之后,就要进入母亲角色,对身心各方面注意保护,为孩子提供最佳的胎内环境。胎儿在子宫内的环境,会直接影响胎儿的发育。怎样为胎儿创设最优的胎内环境呢?怀孕的母亲首先要了解胎儿的生长发育过程及其特点。受精卵的产生,是人的生命开始,它移植在子宫壁上,并迅速地进行细胞分裂繁殖。开始是分裂成两个小细胞,再分裂增值,形成10万亿细胞,并分化成骨细胞、神经细胞、皮细胞等细胞群,然后形成胚胎的三层细胞:外胚层细胞将发展成皮肤、感知觉器官和神经系统;中胚层细胞将发展成肌肉、血液和循环系统;内胚层细胞将发展成消化系统和其他内脏器官及腺体。到两个月左右,胚胎大约有一英寸长,具备人的雏形了,有头、身子和四肢,通过仪器透视,可以看得出手指和脚趾、眼睛、耳朵和小嘴也都清晰可辨,并能观察到心脏的跳动。这期间的发育共需8个星期左右,称之为胚胎期。从怀孕的第三个月到出生,发育中的生命体叫胎儿。胎儿在母体内度过大约270天的寄生生活,就降 Once you find yourself pregnant, it is necessary to enter the mother role, pay attention to all aspects of physical and mental protection, to provide children with the best fetal environment. Fetus in the womb environment, will have a direct impact on fetal development. How to create the best fetal environment for the fetus? Pregnant mothers should first understand the process of fetal growth and development and its characteristics. Fertilized eggs, is the beginning of human life, it is transplanted in the wall of the uterus, and rapid cell division and reproduction. The beginning is split into two small cells, and then split value-added, the formation of 10 trillion cells and differentiate into osteoblasts, nerve cells, skin cells and other cell populations, and then the formation of three layers of embryonic cells: ectodermal cells will develop into the skin, Sensory organs and the nervous system; mesoderm cells will develop into muscle, blood and circulatory system; endoderm cells will develop into the digestive system and other internal organs and glands. By two months or so, the embryo is about an inch long, has a human prototype, with its head, body and limbs visible through the instrument, with its fingers and toes visible, its eyes, its ears and its mouth clearly visible and Can be observed in the beating heart. Development during this period a total of 8 weeks or so, called the embryonic period. From the third month of pregnancy to birth, the developing body of life is called fetus. Fetus in the mother spent about 270 days of parasitic life, it dropped