Meghan Markle is pulling back the curtain on the unconventional techniques she used when it came time to nudge labor along.

The Duchess of Sussex — wife of Prince Harry and mother to Prince Archie and Princess Lilibet — recently marked her daughter’s fourth trip around the sun with a series of Instagram posts on Wednesday.

“Happy birthday to our beautiful girl!” she wrote in the caption of one post. “Four years ago today she came into our lives - and each day is brighter and better because of it. Thanks to all of those sending love and celebrating her special day!”

Two black-and-white photos accompanied the post, showing Meghan snuggled up with Lilibet at different stages of the child’s life.

The duchess then shifted the focus to Harry in a separate post, spotlighting the father-daughter relationship.