How did Rick know Judith wasn't his?

Question

When she told Rick she was pregnant, he knew it wasn't his baby. Rick told Michonne that Judith was not his daughter when he found out that she was pregnant. On Oct 1, there will be a new date.

Hagrid P Hazard · Accepted Answer

When she told Rick she was pregnant, he knew it wasn't his baby. Rick told Michonne that Judith was not his daughter when he found out that she was pregnant. On Oct 1, there will be a new date.

How did Rick know Judith wasn't his?

Related Questions

Can you skip the credits in The Walking Dead Season 2?

Is there a sandbox mode in the walking dead saints and sinners?

Did Daryl die in The Walking Dead?

What happened to Nick in The Walking Dead?

How long is the Walking Dead series in total?

Does Rick's horse die?