第八周结束标志着“胚胎期”的结束和“胎儿期”的开始。
The end of the eighth week marks the end of the "embryonic period" and the beginning of the "fetal period".
他说，为降低孤独症的几率，服用叶酸的最佳时间是怀孕后第四周到第八周之间。
He says the best time to take folic acid to reduce the risk of autism seems to be from four weeks before to eight weeks after the start of pregnancy.
他说，为降低孤独症的几率，服用叶酸的最佳时间是怀孕后第四周到第八周之间。
He says the best time to take folic acid to reduce the risk of autism seems to be from four weeks before to eight weeks after the start of pregnancy.
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