Related על ברכות 43:6

Zavim, Zavot, Niddot, and women who gave birth are permitted to read the Torah and to learn Mishna, Midrash, laws, and Aggadot. And men who had a seminal emission (Baalei Keraim) are forbidden in all of them. Rebbi Yossi says, “He can learn the laws that he is familiar with, as long as he does not arrange the Mishna.”