Two vessel cord??

Grace. β€’ πŸ‘ΌπŸΌπŸ’•πŸ’™ // Keagan 1/31/2020 🌈❀️ // Ethan 9/14/2021 β˜€οΈπŸ’š

My doctor called and said that I have a two vessel cord and a low placenta so I have to get another ultrasound done tomorrow to make sure baby is getting enough nutrients. Anybody get diagnosed with this? What does it mean?