Since the embryo’s neural tube closes between the 24th and 28th day after conception ​ — long before many women realize that they are pregnant — ​ some women who are planning to become pregnant take folic acid.
Karena tabung neuron embrio menutup di antara hari ke - 24 dan ke - 28 setelah pembuahan ​ — lama sebelum banyak wanita sadar bahwa mereka hamil ​ — beberapa wanita yang sedang merencanakan kehamilan mengkonsumsi asam folat.