Vitamin K is a blood clotting aid. If not given, babies can bleed out, sometimes externally, sometimes internally (such as in the brain), as their blood is so thin.
You have the option of not having it, but I would suggest speaking VERY thoroughly to a medical professional before going with this choice.
Or, you can have it given to baby via injection or oral drops.
Downsides of injection: it's sticking a needle in a baby which seems kinda cruel given that they've just entered the big scary world (but not really cause like, they don't even know).
Plus side of injection: one jab there and then and done.
Downside of oral: it's administered in three doses of drops. One around birth, one a week later, and one a month later. Missing one of these doses could result in delayed bleeding, so, pretty much pointless. And there's already a LOT to remember in those first weeks.
Plus side of oral: no nasty needle.
DS had the jab, and DD will have the jab when she arrives. They already get pulled and pushed and poked and prodded for different tests etc, one more needle ain't gonna hurt, then I can forever-forget about it.
Glad your appointments went well guys xx