I don’t see anything that off the top of my head would cause me to believe there would be any issues. Ecklonia Cava is a very healthy natural supplement that humans have taken for a very long time that had numerous health benefits. I know I didn’t stop supplements when my 2nd child was born and everything was great.
With that being said, stopping for at least 90 days prior to ensure everything is good to go is never a bad idea, especially when it comes to conceiving a child.
Good luck!