妇女怀孕后,胎盘分泌一种叫作绒毛膜促性腺激素的物质,这种物质有抑制胃酸分泌的作用,能使胃酸显著减少,消化酶活性降低,并会影响胃肠的消化吸收功能,从而使孕妇产生恶心欲呕、食欲下降、肢软乏力等症状。由于酸味能刺激胃分泌胃液,且能提高消化酶的活性,促进胃肠蠕动,增加食欲,有利于食物的消化与吸收,所以多数孕妇都爱吃酸味食物。从营养学角度来看,孕妇吃些酸性食物有助于满足母亲和胎儿的营养需要。一般怀孕二至三个月后,胎儿骨骼开始形成。构成骨骼的主要成分是钙,但是要使游离钙形成钙盐在骨骼中沉积下来,必须有酸性物质参加。孕妇多吃酸性食物有利于铁的吸收,促进血红蛋白的生成,维 Pregnant women, the placenta secretes a substance called chorionic gonadotropin, which has the effect of inhibiting gastric acid secretion, can significantly reduce gastric acid, digestive enzyme activity decreased, and will affect the gastrointestinal digestion and absorption function, thus So pregnant women have nausea, vomiting, loss of appetite, weakness and other symptoms. Because sour can stimulate gastric secretion of gastric juice, and can improve the activity of digestive enzymes, promote gastrointestinal motility, increase appetite, is conducive to digestion and absorption of food, so most pregnant women love to eat sour foods. From a nutrition standpoint, pregnant women eat acidic foods to help meet the nutritional needs of mothers and fetuses. Two to three months after pregnancy, fetal bones begin to form. The main constituent of the skeleton is calcium, but to make the free calcium to form calcium salts deposited in the bones, you must have the acid to participate. Pregnant women eat more acidic foods are conducive to iron absorption, promote the formation of hemoglobin, Victoria