RapidBrow - safe or not? :\

Zoe🇬🇧 • Leo 30 Sept 2020 - my due date baby 💙 Ollie 15 March 2023 - my mermaid baby 💙 Baby #3 due 11 Sept 2024 💙

I just bought this and while reading what to do I noticed the caution section saying to check with your docs before using if pregnant (I’m waiting to hear back from my midwife) but why wouldn’t this be okay? :S