Pregnant. Potty training?

🐘🐘🐘 • 👧🏼 born 1/19/16. 👼🏼 lost 9/15/17. 👼🏼 lost 11/26/17.

Hey. I'm around 4 weeks pregnant with my second child. My first is 19 months (1.5 years), I was wondering if it's too early to potty train my daughter? I'd love to cut out the cost of diapers, and avoid potty training while I'm heavily pregnant/postpartum but I'm not sure she's ready yet. Any advice?