WATCH: INSIDE THE ROYAL BABY NURSERY
A source told The Sun: "Like all mums, Doria wants to be there for her daughter at this seismic event in her life.
"She has sometimes worried about being so far away but she is absolutely going to be there for her at the birth."
Doria, a yoga teacher, is said to have secretly left her home in LA last week to fly to the UK and has hired a house sitter to walk her dogs.
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"Meghan also wanted to show off her new house to her mum and the two have been enjoying spending time together."
New Idea understands Meghan, 37, has insisted that her mum Doria be in the delivery room with her as she prepares to deliver her baby.
The Sun recently revealed Doria, 62, has been taking pregnancy massage lessons and has been learning all about pressure points for pain relief and breathing techniques.
Prince Harry and Meghan Markle's child will be seventh in the line to the throne.