Personally I would suggest eating well balanced meals instead of pregnancy milk as natural food sources are always better than artificially enhanced food. Also, there’s lots of sugar in those milk. Finally, it’s not cheap. Money better spent on good food experiences.
Similac is nice. ESP the strawberry yoghurt flavour. You can find many free samples of different Brands online. I’m not sure how early can we consume as I didn’t consume as early as week 8. Prolly after week 12