Can you get pregnant without partner through infertility treatment?

Yes. If you are a woman you can use donor sperm from known or anonymous donor used for IUI in natural or stimulated cycle or used for ivf. If you are a man you can father a child using your sperm and an egg donor and the embryos implanted in the womb of a gestational carrier.
Pregnat s partner. You can become pregnant with or without infertility treatment, but only with the help of a donor. You can do insemination or ivf, but you still need a males sperm! until parthogenesis of human eggs becomes a reality this is your only option.