If you talk to her in a blunt tone, she may not accept it. Have a heart-to-heart talk with her, express your thoughts and get her consent. If you plan to have children, you can also tell her to reassure her. Let's learn how to deal with it effectively when the mother-in-law often gives birth to children.
Whether you want to have children or not, you should make it clear to your mother-in-law, with a gentle tone, but still be firm. You should tell her whether you are born or not, you should not cheat her, let alone tell her what you think to gain her understanding.
If you don't want to have children, persuade your mother-in-law patiently, and she won't rush again. If you want to have children, tell her your plans for the future, and let her wait patiently and don't worry too much. You can reassure her by telling her some of your ideas or plans.
After all, having a baby doesn't mean having a baby. You also need to make some preparations, and I'm sure she can understand that the mother-in-law is definitely more concerned about her son's birth. Of course she wants to have grandchildren as soon as possible. As a young man, she should also know what she thinks. Instead of rudely refusing to communicate with her, it is better to have a good talk with her and confess your thoughts, hoping to win her mother-in-law's support. If she agrees with your idea, she is more willing to be patient.
Urging is likely to affect your mood and your work and life. Only by letting her really understand you and support you, will she not keep urging you like this.