The TV personality was accused of endangering her baby after debuting lighter locks last month (Mar12) as mums-to-be are traditionally urged to stop dying their tresses.
But Kardashian, who is already mother to two-year-old son Mason, has assured fans she was careful to ensure the dye did not touch her scalp.
In a post on her blog, she writes, "I did research about doing anything to the color of my hair while pregnant and followed all of the guidelines from my doctor and took the proper precautions necessary. I highlighted my hair, which is considered the safest form of hair color while pregnant, and not to the root, so nothing ever touched my scalp. I also used products that did not contain any ammonia.
"It is also recommended to be in a well-ventilated area as well as being at least in your second trimester, and I followed both of those rules. Anyone who knows anything about me knows that I take caution in all the products I use all the time, but especially when pregnant."
And the 32 year old admits she's not completely won over by her makeover and is considering reverting to her natural jet-black hue.
She adds, "I still am not sure how I feel about the color. I would say dark probably suits me best, but a change is always fun! At this point, I don't want anything else on my hair besides sulfate (sic) free shampoo and conditioner."