茶叶中富含咖啡因(含量高达1～5％)。动物实验已证实,咖啡因有致畸胎作用,可致胎儿腭裂、趾畸形、脊柱裂、缺肾、心脏畸形和脑积水等。咖啡因对人类的致畸效应尚待证实。曾有报道,孕妇饮用过多的含咖啡因饮料,可增加畸胎发生率。咖啡因与自发性流产、早产及围产儿死亡也有一定的关系,咖啡因还可致新生儿黄疸或溶血。因此,目前普遍认 Tea is rich in caffeine (up to 1 ~ 5%). Animal experiments have confirmed that teratogenic effects of caffeine can cause fetal cleft palate, toe deformities, spina bifida, kidney deficiency, heart malformations and hydrocephalus. The teratogenic effect of caffeine on humans remains to be confirmed. It has been reported that pregnant women drinking too much caffeinated beverages can increase the incidence of teratogenicity. Caffeine and spontaneous abortion, premature birth and perinatal death also have a certain relationship, caffeine can also cause neonatal jaundice or hemolysis. Therefore, it is generally accepted now