I've never heard of needing a Hep A vax for conception. If you are at risk for eg. travelling to an area where Hep A is endemic, working in the waste/medical/horticultural industry, or one of the services then maybe, but for the average person Hep A isn't really an issue. I've been vaccinated but I was a medical scientist in my previous life (before becoming a Mummy).

Good luck with your journey into Mummyhood and family life, you'll love it!