Previously you both earned about the same, but now there is a child in the mix, and one of you is working less as a result, and earning less as a result.
Suddenly that 50/50 company shareholding doesn't look so good. Should you change it to 99/1 to get better tax refunds?
What to do then? Well, there may well be economic reasons for the change, which had not previously been considered. When you take these into account, any so-called tax benefits could well become purely incidental.
As each situation is different, it's not practical to outline these here, so please feel free to contact us to discuss.
You may also wish to read a related article: Changing Shares in LTCs: Considerations