Halakhah do Rodzaju 9:7

That is that He commanded us to be fruitful and multiply, with the intention of preserving the species. And that is the commandment of piryah verivyah. And that is His, may He be exalted, saying, "And you, be fruitful and multiply" (Genesis 9:7). And they have already explained (Berakhot 16a) that a groom is exempt from the recitation of Shema on account of being busy with [this] commandment. And the laws of this commandment have already been explained in Chapter 7 of Yevamot. But women are not obligated in this commandment. And in the explanation, they said (Yevamot 65b), "A man is commanded to be fruitful and multiply, but not a woman." (See Parashat Bereishit; Mishneh Torah, Marriage 15.)