What three thingd does an egg need to grow once it has entered the uterus lining?

Once an egg has entered the uterine lining, it needs three key things to grow: a suitable environment, nourishment, and hormonal support. The uterine lining provides a protective and nutrient-rich environment for the developing embryo. Additionally, hormones such as progesterone support the maintenance of the uterine lining and promote further development.